All Exams >
Class 7 >
Science Class 7 >
All Questions
All questions of Nutrition in Animals for Class 7 Exam
Amoeba obtain the food using finger-like projection calledA: PseudopodiaB: SpiraclesC: DiaphragmD: MouthCorrect answer is 'A'. Can you explain this answer?
Amoeba obtain the food using finger-like projection called
A: Pseudopodia
B: Spiracles
C: Diaphragm
D: Mouth
Correct answer is 'A'. Can you explain this answer?
|
Abhay Menon answered |
The finger-like projections are called “pseudopodia“. They not only help in engulfing food molecules but also help the organism in movement.
Mode of nutrition in amoeba is- a)Herbivores
- b)Holozoic
- c)Omnivores
- d)Autotrophic
Correct answer is option 'B'. Can you explain this answer?
Mode of nutrition in amoeba is
a)
Herbivores
b)
Holozoic
c)
Omnivores
d)
Autotrophic
|
Anmol Iyer answered |
Nutrition in amoeba is holozoic. Thus, solid food particles are ingested which are then acted upon by enzymes and digested. It is an omnivore, feeding on both plants and animals. Its diet includes bacteria, microscopic plants like the diatoms, minute algae, microscopic animals like other protozoa, nematodes and even dead organic matter.
1) What process allows digested food to pass into the blood vessels in the wall of the intestine?- a)Excretion
- b)Digestion
- c)Assimilation
- d)Absorption
Correct answer is option 'D'. Can you explain this answer?
1) What process allows digested food to pass into the blood vessels in the wall of the intestine?
a)
Excretion
b)
Digestion
c)
Assimilation
d)
Absorption
|
Rhea Reddy answered |
The process of digested food passing into the blood vessels in the wall of the intestine is called absorption.
Ingestion is the process in which organisma)intake of food inside the body b)Nutrient are utilisedc)Digest the bodyd)Undigested food are removedCorrect answer is 'A'. Can you explain this answer?
|
Kavya Rane answered |
While ingestion refers to the taking in of a substance, there are a multitude of mechanisms by which various organisms do this. Everything from the tiny cells of your body, single-celled organisms, such as amoebas and paramecium, bacteria, and yeasts to animals and humans ingest nutritive substances.
What does animal nutrition include?- a)Nutrient requirement
- b)Mode of intake of food
- c)Utilization of food in the body
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
What does animal nutrition include?
a)
Nutrient requirement
b)
Mode of intake of food
c)
Utilization of food in the body
d)
All of the above
|
Krithika Chavan answered |
Animal nutrition is the study of how animals consume, digest, and utilize nutrients found in their feed. It involves several elements that work together to ensure that the animal's body function properly.
Nutrient Requirement:
The nutrient requirement of animals varies depending on their type, age, size, and physiological state. The nutrients that animals require include carbohydrates, proteins, fats, vitamins, minerals, and water. These nutrients are essential for growth, reproduction, lactation, and maintenance of body functions.
Mode of Intake of Food:
The mode of intake of food is another critical aspect of animal nutrition. Different animals have different feeding behaviors, such as grazing, browsing, or predation. The way animals consume food influences the digestion and absorption of nutrients.
Utilization of Food in the Body:
The utilization of food in the body involves the processes of digestion, absorption, and metabolism. Ingested food is broken down into smaller molecules that can be absorbed by the animal's body. The absorbed nutrients are then transported to the various tissues and organs where they are utilized to support bodily functions.
All of the Above:
Animal nutrition includes all the above aspects and is essential for maintaining the health and productivity of animals. Proper animal nutrition ensures that animals grow and develop correctly, produce high-quality products, and remain healthy. It also helps reduce the risk of metabolic disorders and diseases.
Nutrient Requirement:
The nutrient requirement of animals varies depending on their type, age, size, and physiological state. The nutrients that animals require include carbohydrates, proteins, fats, vitamins, minerals, and water. These nutrients are essential for growth, reproduction, lactation, and maintenance of body functions.
Mode of Intake of Food:
The mode of intake of food is another critical aspect of animal nutrition. Different animals have different feeding behaviors, such as grazing, browsing, or predation. The way animals consume food influences the digestion and absorption of nutrients.
Utilization of Food in the Body:
The utilization of food in the body involves the processes of digestion, absorption, and metabolism. Ingested food is broken down into smaller molecules that can be absorbed by the animal's body. The absorbed nutrients are then transported to the various tissues and organs where they are utilized to support bodily functions.
All of the Above:
Animal nutrition includes all the above aspects and is essential for maintaining the health and productivity of animals. Proper animal nutrition ensures that animals grow and develop correctly, produce high-quality products, and remain healthy. It also helps reduce the risk of metabolic disorders and diseases.
Peristalsis is theA: Slow movement of foodB: Contraction and expansion of muscles of oesophagusC: Downward movement of digested foodD: Assimilation of foodCorrect answer is 'B'. Can you explain this answer?
Peristalsis is the
A: Slow movement of food
B: Contraction and expansion of muscles of oesophagus
C: Downward movement of digested food
D: Assimilation of food
|
Prisha Banerjee answered |
Peristalsis is a series of wave-like muscle contractions that moves food to different processing stations in the digestive tract. The process of peristalsis begins in the oesophagus when a bolus of food is swallowed. The strong wave-like motions of the smooth muscle in the oesophagus carry the food to the stomach, where it is churned into a liquid mixture called chyme.
Which one is a unicellular organism?- a)Frog
- b)Hydra
- c)Amoeba
- d)Ant
Correct answer is option 'C'. Can you explain this answer?
Which one is a unicellular organism?
a)
Frog
b)
Hydra
c)
Amoeba
d)
Ant
|
Anand Ghoshal answered |
Those organisms whose body is made up of only one cell is called unicellular organism. Amoeba is a unicellular organism.
Which juice is released by the stomach to aid digestion?
- a)Pancreatic juice
- b)Bile juice
- c)Gastric juice
- d)Intestinal juice
Correct answer is option 'C'. Can you explain this answer?
Which juice is released by the stomach to aid digestion?
a)
Pancreatic juice
b)
Bile juice
c)
Gastric juice
d)
Intestinal juice
|
Rainbow Rise Classes answered |
The stomach releases digestive juices, including hydrochloric acid and enzymes, to break down food into simpler substances for easier digestion.
Our mouth has __________ glands which secrete saliva.- a)
- Salivary
- b)
- Muscular
- c)
- Digestive
- d)
- Respiratory
Correct answer is option 'A'. Can you explain this answer?
Our mouth has __________ glands which secrete saliva.
a)
b)
c)
d)
|
Keystone Instructors answered |
Salivary glands in our mouth produce saliva. Saliva helps in breaking down food while chewing and swallowing. It also contains enzymes that start the digestion process.
Peristalsis is the- a)Slow movement of food
- b)Contraction and expansion of muscles of oesophagus
- c)Downward movement of digested food
- d)Assimilation of food
Correct answer is option 'B'. Can you explain this answer?
Peristalsis is the
a)
Slow movement of food
b)
Contraction and expansion of muscles of oesophagus
c)
Downward movement of digested food
d)
Assimilation of food
|
Pranavi Roy answered |
Peristalsis is the contraction and expansion of muscles of oesophagus for passage of food towards stomach. As the food passes through oesophagus the wall of it expand to allow passage of food.
Which of the following pair of teeth differ in structure but are similar in function?- a)Canines and incisors
- b)Molars and premolars
- c)Incisors and molars
- d)Premolars and canines
Correct answer is option 'B'. Can you explain this answer?
Which of the following pair of teeth differ in structure but are similar in function?
a)
Canines and incisors
b)
Molars and premolars
c)
Incisors and molars
d)
Premolars and canines
|
|
Rhea Reddy answered |
The molars (12 in number) are the largest teeth of all whereas the premolars (8 in number) present next to molars.
The function of these types of teeth is similar, i.e. crushing and grinding of food.
The function of these types of teeth is similar, i.e. crushing and grinding of food.
Where does the digestion of proteins begin in humans?
- a)Mouth
- b)Stomach
- c) Small intestine
- d) Large intestine
Correct answer is option 'B'. Can you explain this answer?
Where does the digestion of proteins begin in humans?
a)
Mouth
b)
Stomach
c)
Small intestine
d)
Large intestine
|
Ashwat Plays answered |
Food goes to the stomach first where the digestion of proteins begin.
What is the role of villi in the intestine?- a)To make the stomach wider
- b)To absorb food in the small intestine
- c)To help in swallowing food
- d)To produce bile juice
Correct answer is option 'B'. Can you explain this answer?
What is the role of villi in the intestine?
a)
To make the stomach wider
b)
To absorb food in the small intestine
c)
To help in swallowing food
d)
To produce bile juice
|
Harsh Goyal answered |
Role of Villi in the Intestine:
Villi are small, finger-like projections found in the small intestine that play a crucial role in the process of digestion and absorption of nutrients from food. Here are the key points explaining the role of villi in the intestine:
Increased Surface Area:
- Villi increase the surface area of the small intestine, allowing for more efficient absorption of nutrients from food.
- The large surface area provided by villi helps in maximizing the contact between the digested food and the absorptive cells.
Absorption of Nutrients:
- Villi contain specialized cells called enterocytes that are responsible for absorbing nutrients such as sugars, amino acids, fatty acids, and vitamins from the digested food.
- These nutrients are then transported into the bloodstream for distribution to the cells in the body.
Microvilli:
- Each individual enterocyte on the surface of a villus is covered in even smaller projections called microvilli, further increasing the surface area for absorption.
- The microvilli contain enzymes that aid in the breakdown of food molecules, facilitating absorption.
Efficient Nutrient Absorption:
- The combination of villi and microvilli in the small intestine ensures efficient absorption of nutrients, essential for providing energy and building blocks for the body.
- Without villi, the absorption of nutrients would be significantly reduced, leading to malnutrition and other health issues.
In conclusion, villi in the intestine play a vital role in the absorption of nutrients from food by increasing the surface area available for absorption and facilitating the efficient transfer of nutrients into the bloodstream.
Villi are small, finger-like projections found in the small intestine that play a crucial role in the process of digestion and absorption of nutrients from food. Here are the key points explaining the role of villi in the intestine:
Increased Surface Area:
- Villi increase the surface area of the small intestine, allowing for more efficient absorption of nutrients from food.
- The large surface area provided by villi helps in maximizing the contact between the digested food and the absorptive cells.
Absorption of Nutrients:
- Villi contain specialized cells called enterocytes that are responsible for absorbing nutrients such as sugars, amino acids, fatty acids, and vitamins from the digested food.
- These nutrients are then transported into the bloodstream for distribution to the cells in the body.
Microvilli:
- Each individual enterocyte on the surface of a villus is covered in even smaller projections called microvilli, further increasing the surface area for absorption.
- The microvilli contain enzymes that aid in the breakdown of food molecules, facilitating absorption.
Efficient Nutrient Absorption:
- The combination of villi and microvilli in the small intestine ensures efficient absorption of nutrients, essential for providing energy and building blocks for the body.
- Without villi, the absorption of nutrients would be significantly reduced, leading to malnutrition and other health issues.
In conclusion, villi in the intestine play a vital role in the absorption of nutrients from food by increasing the surface area available for absorption and facilitating the efficient transfer of nutrients into the bloodstream.
Mechanism in which amoeba takes in O2 and gives out CO2 is called _______.
- a)Respiration
- b)Diffusion
- c)Assimilation
- d)Absorption
Correct answer is option 'B'. Can you explain this answer?
Mechanism in which amoeba takes in O2 and gives out CO2 is called _______.
a)
Respiration
b)
Diffusion
c)
Assimilation
d)
Absorption
|
Priyanka Sharma answered |
Amoeba gets oxygen gas dissolved in surrounding water through its plasma membrane by the process of diffusion.The carbon dioxide gas is also liberated in the surrounding water through the same process of diffusion.
What does saliva do to food?- a)Makes it sweeter
- b)Breaks down starch into sugars
- c)Changes its color
- d)Turns it into liquid
Correct answer is option 'B'. Can you explain this answer?
What does saliva do to food?
a)
Makes it sweeter
b)
Breaks down starch into sugars
c)
Changes its color
d)
Turns it into liquid
|
Tutorpedia Coaching answered |
Saliva helps in breaking down the starch in food into sugars. This makes it easier for our bodies to digest the food we eat. So, saliva plays an important role in making food easier for our bodies to use for energy.
The acid present in the stomach:- a)Protects the stomach lining from harmful substances.
- b)Kills the harmful bacteria that may enter along with the food.
- c)Digests starch into simpler sugars.
- d)Makes the medium alkaline.
Correct answer is option 'B'. Can you explain this answer?
The acid present in the stomach:
a)
Protects the stomach lining from harmful substances.
b)
Kills the harmful bacteria that may enter along with the food.
c)
Digests starch into simpler sugars.
d)
Makes the medium alkaline.
|
Amit Kumar answered |
'Hydrochloric acid' is an acid that is secreted in the stomach. It helps to kill the harmful bacteria that may enter the food.
Cellulose digestion in ruminants occurs in ________.
- a)Omasum
- b)Rumen
- c)Abomasum
- d)Reticulum
Correct answer is option 'B'. Can you explain this answer?
Cellulose digestion in ruminants occurs in ________.
a)
Omasum
b)
Rumen
c)
Abomasum
d)
Reticulum
|
|
Maanvi Prabhu answered |
Cellulose digestion in ruminants occurs in the rumen, which is part of the ruminant's four-chambered stomach:
In the rumen, bacteria break down cellulose through fermentation. The bacteria also convert the ingested food into cud through mechanical digestion.
Here's what happens in the rumen:
Mechanical processing: Plant material is mechanically processed in the rumen.
Exposure to bacteria: The plant material is exposed to bacteria that can break down cellulose.
Production of volatile fatty acids: Anaerobic microbes in the rumen ferment cellulose and hemicellulose to produce volatile fatty acids (VFAs). VFAs are the main nutrient source for the ruminant.
Ruminants, like cattle, are cud-chewing animals.
In the rumen, bacteria break down cellulose through fermentation. The bacteria also convert the ingested food into cud through mechanical digestion.
Here's what happens in the rumen:
Mechanical processing: Plant material is mechanically processed in the rumen.
Exposure to bacteria: The plant material is exposed to bacteria that can break down cellulose.
Production of volatile fatty acids: Anaerobic microbes in the rumen ferment cellulose and hemicellulose to produce volatile fatty acids (VFAs). VFAs are the main nutrient source for the ruminant.
Ruminants, like cattle, are cud-chewing animals.
The stomach is a thick-walled bag that receives food from the food pipe at one end and opens into the ____ at the other.- a)large intestine
- b)small intestine
- c)liver
- d)pancreas
Correct answer is option 'B'. Can you explain this answer?
The stomach is a thick-walled bag that receives food from the food pipe at one end and opens into the ____ at the other.
a)
large intestine
b)
small intestine
c)
liver
d)
pancreas
|
|
Tutorpedia Coaching answered |
The stomach receives food from the food pipe and opens into the small intestine at the other end for further digestion and absorption of nutrients.
Amoeba obtain the food using finger-like projection called- a)Pseudopodia
- b)Spiracles
- c)Diaphragm
- d)Mouth
Correct answer is option 'A'. Can you explain this answer?
Amoeba obtain the food using finger-like projection called
a)
Pseudopodia
b)
Spiracles
c)
Diaphragm
d)
Mouth
|
Pooja Banerjee answered |
Amoeba obtains its food by a process called as endocytosis. It extends finger like projections called as pseudopodia around the food particle through the flexibility of its cell membrane and cytoplasm, and then engulfs the food particle. Once engulfed, it is stored in small vacuoles which contains enzymes to break the food into simpler forms which can be easily taken up by the amoeba.
Why do we get instant energy from glucose?- a)It is a complex sugar
- b)It requires no digestion
- c)It is stored in the muscles
- d)It is converted into fat
Correct answer is option 'B'. Can you explain this answer?
a)
It is a complex sugar
b)
It requires no digestion
c)
It is stored in the muscles
d)
It is converted into fat
|
Gunjan Lakhani answered |
Glucose provides instant energy because it is a simple sugar that does not require digestion and can be quickly absorbed into the bloodstream, providing immediate energy to cells.
Where is bile stored temporarily before being released into the small intestine?- a)Liver
- b)Pancreas
- c)Gallbladder
- d)Stomach
Correct answer is option 'C'. Can you explain this answer?
a)
Liver
b)
Pancreas
c)
Gallbladder
d)
Stomach
|
|
Rainbow Rise Classes answered |
Bile is stored temporarily in the gallbladder before being released into the small intestine to aid in the digestion and emulsification of fats.
Where does the digestion of starch start in the human body?- a)Stomach
- b)Mouth
- c)Small intestine
- d)Large intestine
Correct answer is option 'B'. Can you explain this answer?
a)
Stomach
b)
Mouth
c)
Small intestine
d)
Large intestine
|
|
Shabnam Shah answered |
Mouth
Digestion of starch begins in the mouth. When we chew our food, our salivary glands release an enzyme called amylase. Amylase is responsible for breaking down starch molecules into smaller sugars like maltose. This initial breakdown of starch into simpler sugars sets the stage for further digestion in the digestive tract.
Stomach
Once the chewed food mixed with saliva reaches the stomach, the acidic environment of the stomach stops the action of amylase. Starch digestion does not continue in the stomach due to the low pH that denatures the amylase enzyme.
Small Intestine
In the small intestine, the pancreas releases more amylase to further break down the remaining starch into maltose and other simple sugars. The lining of the small intestine also produces enzymes that continue the breakdown of starch into individual glucose molecules, which can then be absorbed into the bloodstream for energy.
Large Intestine
By the time food reaches the large intestine, most of the starch has been broken down into simple sugars. The large intestine's main role is to absorb water and electrolytes from the remaining food particles, but starch digestion is mostly completed in the small intestine.
Digestion of starch begins in the mouth. When we chew our food, our salivary glands release an enzyme called amylase. Amylase is responsible for breaking down starch molecules into smaller sugars like maltose. This initial breakdown of starch into simpler sugars sets the stage for further digestion in the digestive tract.
Stomach
Once the chewed food mixed with saliva reaches the stomach, the acidic environment of the stomach stops the action of amylase. Starch digestion does not continue in the stomach due to the low pH that denatures the amylase enzyme.
Small Intestine
In the small intestine, the pancreas releases more amylase to further break down the remaining starch into maltose and other simple sugars. The lining of the small intestine also produces enzymes that continue the breakdown of starch into individual glucose molecules, which can then be absorbed into the bloodstream for energy.
Large Intestine
By the time food reaches the large intestine, most of the starch has been broken down into simple sugars. The large intestine's main role is to absorb water and electrolytes from the remaining food particles, but starch digestion is mostly completed in the small intestine.
What is the primary organelle in Amoeba responsible for regulating its movement and maintaining its shape?
- a)Cell membrane
- b)Nucleus
- c)Vacuoles
- d)Pseudopodia
Correct answer is option 'D'. Can you explain this answer?
What is the primary organelle in Amoeba responsible for regulating its movement and maintaining its shape?
a)
Cell membrane
b)
Nucleus
c)
Vacuoles
d)
Pseudopodia
|
|
Aryan Mukherjee answered |
Primary Organelle in Amoeba responsible for regulating its movement and maintaining its shape
Amoeba is a single-celled organism that belongs to the group of protozoa. It moves and changes its shape primarily through the use of pseudopodia, which are temporary projections of its cytoplasm. The primary organelle responsible for regulating its movement and maintaining its shape in Amoeba is the pseudopodia.
Pseudopodia
Pseudopodia are temporary extensions of the cell membrane that allow Amoeba to move, capture food, and engulf prey. The term "pseudopodia" means "false feet," which accurately describes these structures as they are not permanent appendages but rather dynamic extensions that can be formed and retracted as needed by the cell.
Regulating Movement
Pseudopodia play a crucial role in the locomotion of Amoeba. By extending these projections in the direction of movement, the cell can propel itself forward. The cytoplasm flows into the pseudopodia, pushing the cell membrane outward and causing the organism to move in the desired direction. The constant formation and retraction of pseudopodia allow Amoeba to navigate its environment efficiently.
Maintaining Shape
In addition to facilitating movement, pseudopodia also help maintain the shape of Amoeba. By controlling the extension and retraction of these projections, the cell can adjust its size and shape as needed. This flexibility is essential for functions such as feeding, reproduction, and responding to changes in the environment.
In conclusion, pseudopodia are the primary organelles in Amoeba responsible for regulating its movement and maintaining its shape. These dynamic structures enable the cell to exhibit remarkable flexibility and adaptability, allowing it to survive and thrive in diverse habitats.
Amoeba is a single-celled organism that belongs to the group of protozoa. It moves and changes its shape primarily through the use of pseudopodia, which are temporary projections of its cytoplasm. The primary organelle responsible for regulating its movement and maintaining its shape in Amoeba is the pseudopodia.
Pseudopodia
Pseudopodia are temporary extensions of the cell membrane that allow Amoeba to move, capture food, and engulf prey. The term "pseudopodia" means "false feet," which accurately describes these structures as they are not permanent appendages but rather dynamic extensions that can be formed and retracted as needed by the cell.
Regulating Movement
Pseudopodia play a crucial role in the locomotion of Amoeba. By extending these projections in the direction of movement, the cell can propel itself forward. The cytoplasm flows into the pseudopodia, pushing the cell membrane outward and causing the organism to move in the desired direction. The constant formation and retraction of pseudopodia allow Amoeba to navigate its environment efficiently.
Maintaining Shape
In addition to facilitating movement, pseudopodia also help maintain the shape of Amoeba. By controlling the extension and retraction of these projections, the cell can adjust its size and shape as needed. This flexibility is essential for functions such as feeding, reproduction, and responding to changes in the environment.
In conclusion, pseudopodia are the primary organelles in Amoeba responsible for regulating its movement and maintaining its shape. These dynamic structures enable the cell to exhibit remarkable flexibility and adaptability, allowing it to survive and thrive in diverse habitats.
What are the two different sets of teeth that humans have?- a)Milk teeth and temporary teeth
- b)First teeth and second teeth
- c)Milk teeth and permanent teeth
- d)Primary teeth and adult teeth
Correct answer is option 'C'. Can you explain this answer?
What are the two different sets of teeth that humans have?
a)
Milk teeth and temporary teeth
b)
First teeth and second teeth
c)
Milk teeth and permanent teeth
d)
Primary teeth and adult teeth
|
Aashna Chopra answered |
Human Teeth:
Human beings have two different sets of teeth throughout their lifetime. These sets are known as milk teeth and permanent teeth.
Milk Teeth:
- Milk teeth, also known as deciduous teeth or baby teeth, are the first set of teeth that humans develop.
- These teeth usually start to appear around 6 months of age and are gradually replaced by permanent teeth starting around the age of 6.
- There are a total of 20 milk teeth, which include 8 incisors, 4 canines, and 8 molars.
Permanent Teeth:
- Permanent teeth are the second set of teeth that replace milk teeth.
- They begin to emerge around the age of 6 and continue to develop until early adulthood.
- There are a total of 32 permanent teeth in adults, which include 8 incisors, 4 canines, 8 premolars, and 12 molars.
- These teeth are meant to last a lifetime, hence the name "permanent teeth."
In conclusion, humans have two sets of teeth - milk teeth and permanent teeth. Milk teeth are the first set that develop in childhood and are replaced by permanent teeth, which are meant to last a lifetime.
In which part of the human digestive system does most digestion and absorption of nutrients take place?
- a)Stomach
- b)Small intestine
- c)Mouth
- d)Large intestine
Correct answer is option 'B'. Can you explain this answer?
In which part of the human digestive system does most digestion and absorption of nutrients take place?
a)
Stomach
b)
Small intestine
c)
Mouth
d)
Large intestine
|
Eduskill Classes answered |
The digestion of starch begins in the mouth where the enzyme amylase, present in saliva, breaks down starch into simpler sugars.
Which part of the digestive canal is responsible for the formation of feces?- a)Stomach
- b)Small intestine
- c)Large intestine
- d)Esophagus
Correct answer is option 'C'. Can you explain this answer?
a)
Stomach
b)
Small intestine
c)
Large intestine
d)
Esophagus
|
|
Ram Bangledar answered |
The part of the digestive canal responsible for the formation of feces is the large intestine, also known as the colon.
The large intestine:
1. Absorbs water and electrolytes
2. Concentrates waste
3. Forms and stores feces
Specifically, the process occurs in the following sections:
1. Ascending colon: Water absorption
2. Transverse colon: Electrolyte absorption
3. Descending colon: Feces formation and concentration
4. Sigmoid colon: Feces storage
5. Rectum: Final storage before elimination
The large intestine transforms the liquid waste from the small intestine into semi-solid feces through:
- Water absorption
- Electrolyte balance
- Microbial fermentation
- Mucous secretion
The resulting feces are then eliminated through the anus during defecation.
The large intestine:
1. Absorbs water and electrolytes
2. Concentrates waste
3. Forms and stores feces
Specifically, the process occurs in the following sections:
1. Ascending colon: Water absorption
2. Transverse colon: Electrolyte absorption
3. Descending colon: Feces formation and concentration
4. Sigmoid colon: Feces storage
5. Rectum: Final storage before elimination
The large intestine transforms the liquid waste from the small intestine into semi-solid feces through:
- Water absorption
- Electrolyte balance
- Microbial fermentation
- Mucous secretion
The resulting feces are then eliminated through the anus during defecation.
What is the primary characteristic of diarrhoea?- a) Frequent urination
- b) Watery stool
- c) Headaches
- d) Fever
Correct answer is option 'B'. Can you explain this answer?
What is the primary characteristic of diarrhoea?
a)
Frequent urination
b)
Watery stool
c)
Headaches
d)
Fever
|
Mansi rane answered |
Understanding Diarrhoea
Diarrhoea is primarily characterized by the frequent passage of watery stool. This condition can affect individuals of all ages and can arise from various causes, including infections, dietary changes, or underlying health issues.
Key Characteristics of Diarrhoea:
- Watery Stool: The hallmark of diarrhoea is the consistency of the stool. It is often loose or watery, which differentiates it from normal bowel movements.
- Frequency: Individuals may experience an increased frequency of bowel movements, often more than three times a day.
- Causes: Diarrhoea can result from viral infections (like norovirus), bacterial infections (like E. coli), parasites, or even food intolerances.
- Dehydration Risk: One of the significant concerns associated with diarrhoea is dehydration. The body loses fluids and electrolytes rapidly, making it essential to stay hydrated.
Other Symptoms that May Accompany Diarrhoea:
- Fever: While fever can be present, it is not a defining characteristic of diarrhoea itself.
- Abdominal Pain: Cramping and discomfort in the abdomen may occur alongside diarrhoea.
- Nausea and Vomiting: Some individuals may also experience nausea or vomiting, but these are not defining symptoms.
Conclusion:
In summary, while other symptoms can accompany diarrhoea, the primary characteristic is the presence of watery stool. Understanding this can help in identifying the condition and seeking appropriate treatment.
Diarrhoea is primarily characterized by the frequent passage of watery stool. This condition can affect individuals of all ages and can arise from various causes, including infections, dietary changes, or underlying health issues.
Key Characteristics of Diarrhoea:
- Watery Stool: The hallmark of diarrhoea is the consistency of the stool. It is often loose or watery, which differentiates it from normal bowel movements.
- Frequency: Individuals may experience an increased frequency of bowel movements, often more than three times a day.
- Causes: Diarrhoea can result from viral infections (like norovirus), bacterial infections (like E. coli), parasites, or even food intolerances.
- Dehydration Risk: One of the significant concerns associated with diarrhoea is dehydration. The body loses fluids and electrolytes rapidly, making it essential to stay hydrated.
Other Symptoms that May Accompany Diarrhoea:
- Fever: While fever can be present, it is not a defining characteristic of diarrhoea itself.
- Abdominal Pain: Cramping and discomfort in the abdomen may occur alongside diarrhoea.
- Nausea and Vomiting: Some individuals may also experience nausea or vomiting, but these are not defining symptoms.
Conclusion:
In summary, while other symptoms can accompany diarrhoea, the primary characteristic is the presence of watery stool. Understanding this can help in identifying the condition and seeking appropriate treatment.
What is the function of the rectum in the human digestive system?- a)Digesting proteins
- b)Storing bile
- c)Absorbing nutrients
- d)Storing feces
Correct answer is option 'D'. Can you explain this answer?
a)
Digesting proteins
b)
Storing bile
c)
Absorbing nutrients
d)
Storing feces
|
Krithika Joshi answered |
Function of the Rectum in the Human Digestive System
The rectum plays a crucial role in the human digestive system, primarily functioning as a storage site for feces before elimination. Here are the key points that highlight its importance:
1. Location and Structure
- The rectum is the final section of the large intestine, connecting the colon to the anus.
- It is approximately 12 centimeters long and is designed to accommodate varying amounts of waste.
2. Storage of Feces
- The primary function of the rectum is to store fecal matter until it is ready to be expelled from the body.
- It can expand to hold up to several hundred grams of feces without discomfort.
3. Sensory Role
- The rectum contains sensory receptors that signal when it is full, triggering the urge to defecate.
- This helps maintain the body's waste elimination process efficiently.
4. Regulation of Defecation
- The rectum works in conjunction with the anal sphincters, which control the release of feces.
- When the rectal walls stretch due to stored waste, the internal anal sphincter relaxes, and the external anal sphincter can be voluntarily controlled.
5. Conclusion
- In summary, the rectum is vital for storing feces and plays a key role in the process of defecation, ensuring that the body can eliminate waste effectively.
- Its ability to signal fullness and regulate elimination is essential for maintaining overall digestive health.
The rectum plays a crucial role in the human digestive system, primarily functioning as a storage site for feces before elimination. Here are the key points that highlight its importance:
1. Location and Structure
- The rectum is the final section of the large intestine, connecting the colon to the anus.
- It is approximately 12 centimeters long and is designed to accommodate varying amounts of waste.
2. Storage of Feces
- The primary function of the rectum is to store fecal matter until it is ready to be expelled from the body.
- It can expand to hold up to several hundred grams of feces without discomfort.
3. Sensory Role
- The rectum contains sensory receptors that signal when it is full, triggering the urge to defecate.
- This helps maintain the body's waste elimination process efficiently.
4. Regulation of Defecation
- The rectum works in conjunction with the anal sphincters, which control the release of feces.
- When the rectal walls stretch due to stored waste, the internal anal sphincter relaxes, and the external anal sphincter can be voluntarily controlled.
5. Conclusion
- In summary, the rectum is vital for storing feces and plays a key role in the process of defecation, ensuring that the body can eliminate waste effectively.
- Its ability to signal fullness and regulate elimination is essential for maintaining overall digestive health.
Which of the following are the main steps of nutrition in humans?- a)Ingestion, digestion, absorption, assimilation, egestion
- b)Ingestion, absorption, egestion, digestion, assimilation
- c)Absorption, ingestion, digestion, egestion, assimilation
- d)Digestion, ingestion, absorption, assimilation, egestion
Correct answer is option 'A'. Can you explain this answer?
Which of the following are the main steps of nutrition in humans?
a)
Ingestion, digestion, absorption, assimilation, egestion
b)
Ingestion, absorption, egestion, digestion, assimilation
c)
Absorption, ingestion, digestion, egestion, assimilation
d)
Digestion, ingestion, absorption, assimilation, egestion
|
|
Aarushi kumar answered |
Steps of Nutrition in Humans
Ingestion:
- Ingestion is the process of taking food into the body through the mouth.
- It involves the intake of food and liquids that provide essential nutrients for the body.
Digestion:
- Digestion is the process of breaking down food into smaller molecules that can be absorbed by the body.
- It occurs in the digestive system through the action of enzymes and stomach acids.
- The nutrients are then extracted from the food particles.
Absorption:
- Absorption is the process of taking the digested food molecules into the bloodstream.
- It occurs mainly in the small intestine, where nutrients like carbohydrates, proteins, and fats are absorbed.
- These nutrients are then transported to different parts of the body for energy and growth.
Assimilation:
- Assimilation is the process of using the absorbed nutrients to build new cells and tissues or to provide energy for various metabolic processes.
- The body utilizes the nutrients from food to maintain its functions and repair damaged tissues.
Egestion:
- Egestion is the process of eliminating undigested food and waste products from the body.
- It involves the removal of indigestible materials through the process of defecation.
By following these main steps of nutrition - ingestion, digestion, absorption, assimilation, and egestion, the human body is able to obtain the necessary nutrients for growth, energy, and overall health.
Ingestion:
- Ingestion is the process of taking food into the body through the mouth.
- It involves the intake of food and liquids that provide essential nutrients for the body.
Digestion:
- Digestion is the process of breaking down food into smaller molecules that can be absorbed by the body.
- It occurs in the digestive system through the action of enzymes and stomach acids.
- The nutrients are then extracted from the food particles.
Absorption:
- Absorption is the process of taking the digested food molecules into the bloodstream.
- It occurs mainly in the small intestine, where nutrients like carbohydrates, proteins, and fats are absorbed.
- These nutrients are then transported to different parts of the body for energy and growth.
Assimilation:
- Assimilation is the process of using the absorbed nutrients to build new cells and tissues or to provide energy for various metabolic processes.
- The body utilizes the nutrients from food to maintain its functions and repair damaged tissues.
Egestion:
- Egestion is the process of eliminating undigested food and waste products from the body.
- It involves the removal of indigestible materials through the process of defecation.
By following these main steps of nutrition - ingestion, digestion, absorption, assimilation, and egestion, the human body is able to obtain the necessary nutrients for growth, energy, and overall health.
In digestion the unused parts of the food are________.- a)utilised
- b)defecated
- c)converted
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
In digestion the unused parts of the food are________.
a)
utilised
b)
defecated
c)
converted
d)
None of the above
|
Subham Verma answered |
Defecated
In digestion, the unused parts of the food are eliminated from the body through a process known as defecation. This process involves the removal of solid waste that the body cannot digest or absorb. Here is an explanation of how this process works:
1. Digestive Process:
- When we eat food, it passes through the digestive system where it is broken down into nutrients that the body can use.
- The body absorbs these nutrients such as vitamins, minerals, proteins, and carbohydrates from the food.
- However, there are parts of the food that the body cannot digest, such as fiber and other indigestible substances.
2. Formation of Waste:
- These indigestible parts, along with other waste products produced during the digestion process, are formed into a solid mass known as feces in the large intestine.
- The feces consist of undigested food, bacteria, mucus, and dead cells from the lining of the digestive tract.
3. Elimination through Defecation:
- The feces are stored in the rectum until they are ready to be eliminated from the body.
- The act of defecation involves the expulsion of feces from the body through the anus.
- This process is controlled by the nervous system and the muscles of the rectum and anus.
In conclusion, defecation is a vital part of the digestive process as it helps the body get rid of waste material that it cannot use. It is important to maintain healthy digestion to ensure proper elimination of waste from the body.
In digestion, the unused parts of the food are eliminated from the body through a process known as defecation. This process involves the removal of solid waste that the body cannot digest or absorb. Here is an explanation of how this process works:
1. Digestive Process:
- When we eat food, it passes through the digestive system where it is broken down into nutrients that the body can use.
- The body absorbs these nutrients such as vitamins, minerals, proteins, and carbohydrates from the food.
- However, there are parts of the food that the body cannot digest, such as fiber and other indigestible substances.
2. Formation of Waste:
- These indigestible parts, along with other waste products produced during the digestion process, are formed into a solid mass known as feces in the large intestine.
- The feces consist of undigested food, bacteria, mucus, and dead cells from the lining of the digestive tract.
3. Elimination through Defecation:
- The feces are stored in the rectum until they are ready to be eliminated from the body.
- The act of defecation involves the expulsion of feces from the body through the anus.
- This process is controlled by the nervous system and the muscles of the rectum and anus.
In conclusion, defecation is a vital part of the digestive process as it helps the body get rid of waste material that it cannot use. It is important to maintain healthy digestion to ensure proper elimination of waste from the body.
Practice Quiz or MCQ (Multiple Choice Questions) with solutions are available for Practice, which would help you prepare for chapter Nutrition in Animals, Class 7, Science. You can practice these practice quizzes as per your speed and improvise the topic. Q. Mode of nutrition in animal is- a)Saprophytic
- b)Heterotrophic
- c)Omnivores
- d)Autotrophic
Correct answer is option 'B'. Can you explain this answer?
Practice Quiz or MCQ (Multiple Choice Questions) with solutions are available for Practice, which would help you prepare for chapter Nutrition in Animals, Class 7, Science. You can practice these practice quizzes as per your speed and improvise the topic.
Q. Mode of nutrition in animal is
a)
Saprophytic
b)
Heterotrophic
c)
Omnivores
d)
Autotrophic
|
Shobha dasgupta answered |
Understanding Modes of Nutrition in Animals
In the context of Chapter Nutrition in Animals from Class 7 Science, it's essential to explore the different modes of nutrition employed by various organisms. Among the given options, the correct answer is Heterotrophic nutrition (option B).
What is Heterotrophic Nutrition?
- Heterotrophic nutrition refers to the way animals obtain their food by consuming other living organisms or organic matter.
- Animals cannot produce their own food through photosynthesis like plants; instead, they rely on other organisms for sustenance.
Types of Heterotrophic Nutrition
- Herbivores: Animals that primarily eat plants (e.g., cows, deer).
- Carnivores: Animals that primarily consume other animals (e.g., lions, eagles).
- Omnivores: Animals that eat both plants and animals (e.g., humans, bears).
- Saprophytic: While some organisms like fungi exhibit saprophytic nutrition, animals do not fall into this category.
Why Not Other Options?
- Saprophytic (Option A): This mode of nutrition involves organisms that feed on dead and decaying matter. It does not apply to animals as a whole.
- Omnivores (Option C): While omnivores are a category of heterotrophs, the term "heterotrophic" encompasses all animals, making it a broader and more accurate classification.
- Autotrophic (Option D): Autotrophic organisms, like plants, produce their own food through photosynthesis, which is not applicable to animals.
Conclusion
Thus, the correct answer is Heterotrophic (Option B) as it accurately describes the mode of nutrition prevalent in animals, highlighting their dependence on other organisms for food. Understanding this concept is crucial for grasping the fundamental principles of nutrition in biology.
In the context of Chapter Nutrition in Animals from Class 7 Science, it's essential to explore the different modes of nutrition employed by various organisms. Among the given options, the correct answer is Heterotrophic nutrition (option B).
What is Heterotrophic Nutrition?
- Heterotrophic nutrition refers to the way animals obtain their food by consuming other living organisms or organic matter.
- Animals cannot produce their own food through photosynthesis like plants; instead, they rely on other organisms for sustenance.
Types of Heterotrophic Nutrition
- Herbivores: Animals that primarily eat plants (e.g., cows, deer).
- Carnivores: Animals that primarily consume other animals (e.g., lions, eagles).
- Omnivores: Animals that eat both plants and animals (e.g., humans, bears).
- Saprophytic: While some organisms like fungi exhibit saprophytic nutrition, animals do not fall into this category.
Why Not Other Options?
- Saprophytic (Option A): This mode of nutrition involves organisms that feed on dead and decaying matter. It does not apply to animals as a whole.
- Omnivores (Option C): While omnivores are a category of heterotrophs, the term "heterotrophic" encompasses all animals, making it a broader and more accurate classification.
- Autotrophic (Option D): Autotrophic organisms, like plants, produce their own food through photosynthesis, which is not applicable to animals.
Conclusion
Thus, the correct answer is Heterotrophic (Option B) as it accurately describes the mode of nutrition prevalent in animals, highlighting their dependence on other organisms for food. Understanding this concept is crucial for grasping the fundamental principles of nutrition in biology.
Which are cutting teeth in humans?- a)Canines
- b)Incisors
- c)Premolars
- d) Molars
Correct answer is option 'B'. Can you explain this answer?
Which are cutting teeth in humans?
a)
Canines
b)
Incisors
c)
Premolars
d)
Molars
|
|
Pranab Khanna answered |
Incisors
The cutting teeth in humans are known as incisors. These are the flat, chisel-shaped teeth located at the front of the mouth. Humans have a total of eight incisors, four on the top and four on the bottom.
Function
Incisors are responsible for cutting and slicing food. They have sharp edges that help in biting off and cutting through food items. These teeth play a crucial role in the initial stages of digestion by breaking down food into smaller, more manageable pieces.
Appearance
Incisors are typically the first set of teeth to emerge in the mouth, usually around the age of six months. They have a single root and are the smallest teeth in the mouth. Incisors have a flat surface with sharp edges, which aids in their cutting function.
Care
It is important to take care of incisors by practicing good oral hygiene habits such as brushing, flossing, and regular dental check-ups. Proper care can help prevent issues such as cavities, gum disease, and other dental problems that can affect the health and function of incisors.
In conclusion, incisors are the cutting teeth in humans that play a vital role in the process of eating and digestion. Taking care of these teeth is essential for maintaining overall oral health and well-being.
The cutting teeth in humans are known as incisors. These are the flat, chisel-shaped teeth located at the front of the mouth. Humans have a total of eight incisors, four on the top and four on the bottom.
Function
Incisors are responsible for cutting and slicing food. They have sharp edges that help in biting off and cutting through food items. These teeth play a crucial role in the initial stages of digestion by breaking down food into smaller, more manageable pieces.
Appearance
Incisors are typically the first set of teeth to emerge in the mouth, usually around the age of six months. They have a single root and are the smallest teeth in the mouth. Incisors have a flat surface with sharp edges, which aids in their cutting function.
Care
It is important to take care of incisors by practicing good oral hygiene habits such as brushing, flossing, and regular dental check-ups. Proper care can help prevent issues such as cavities, gum disease, and other dental problems that can affect the health and function of incisors.
In conclusion, incisors are the cutting teeth in humans that play a vital role in the process of eating and digestion. Taking care of these teeth is essential for maintaining overall oral health and well-being.
Where does the complete digestion of food occur?- a)Stomach
- b)Large intestine
- c)Small intestine
- d)Mouth
Correct answer is option 'C'. Can you explain this answer?
a)
Stomach
b)
Large intestine
c)
Small intestine
d)
Mouth
|
|
Mrinalini iyer answered |
Small Intestine
The complete digestion of food occurs in the small intestine.
Function of Small Intestine
- The small intestine is where the majority of chemical digestion and nutrient absorption takes place.
- Enzymes from the pancreas and bile from the liver help break down food particles into smaller molecules that can be absorbed by the body.
Process of Digestion in Small Intestine
- After food passes through the stomach, it enters the small intestine where further breakdown of proteins, carbohydrates, and fats occurs.
- Enzymes in the small intestine help break down these macromolecules into smaller units like amino acids, simple sugars, and fatty acids.
- Villi and microvilli in the small intestine increase the surface area available for absorption of these nutrients into the bloodstream.
Importance of Small Intestine
- The small intestine is crucial for the absorption of nutrients such as vitamins, minerals, and other essential substances that are needed for the body to function properly.
- The nutrients absorbed in the small intestine are then transported throughout the body to provide energy and support various physiological processes.
In conclusion, the small intestine plays a vital role in the complete digestion of food and the absorption of essential nutrients that are necessary for maintaining overall health and well-being.
The complete digestion of food occurs in the small intestine.
Function of Small Intestine
- The small intestine is where the majority of chemical digestion and nutrient absorption takes place.
- Enzymes from the pancreas and bile from the liver help break down food particles into smaller molecules that can be absorbed by the body.
Process of Digestion in Small Intestine
- After food passes through the stomach, it enters the small intestine where further breakdown of proteins, carbohydrates, and fats occurs.
- Enzymes in the small intestine help break down these macromolecules into smaller units like amino acids, simple sugars, and fatty acids.
- Villi and microvilli in the small intestine increase the surface area available for absorption of these nutrients into the bloodstream.
Importance of Small Intestine
- The small intestine is crucial for the absorption of nutrients such as vitamins, minerals, and other essential substances that are needed for the body to function properly.
- The nutrients absorbed in the small intestine are then transported throughout the body to provide energy and support various physiological processes.
In conclusion, the small intestine plays a vital role in the complete digestion of food and the absorption of essential nutrients that are necessary for maintaining overall health and well-being.
What is the primary purpose of digestion in our body?- a)To turn complex substances into simpler ones
- b)To make the food tasty
- c)To change food colors
- d)To make food bigger
Correct answer is option 'A'. Can you explain this answer?
What is the primary purpose of digestion in our body?
a)
To turn complex substances into simpler ones
b)
To make the food tasty
c)
To change food colors
d)
To make food bigger
|
Bespoke Classes answered |
- Digestion in our body helps to break down the complex substances in the food we eat into simpler ones so that our body can use them easily. It's like when you eat a big piece of cake, digestion helps to change it into smaller pieces so your body can take the good parts and use them to make you strong and healthy.
Chapter doubts & questions for Nutrition in Animals - Science Class 7 2025 is part of Class 7 exam preparation. The chapters have been prepared according to the Class 7 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 7 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
Chapter doubts & questions of Nutrition in Animals - Science Class 7 in English & Hindi are available as part of Class 7 exam.
Download more important topics, notes, lectures and mock test series for Class 7 Exam by signing up for free.
Science Class 7
110 videos|252 docs|28 tests
|
Signup to see your scores go up within 7 days!
Study with 1000+ FREE Docs, Videos & Tests
10M+ students study on EduRev
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup