Class 7 Science Chapter 7 Question Answers - Transportation in Animals and Plants

Very Short Question Answer :

Q1: Circulatory system consists of the heart, blood vessels and _____________.

Ans: Blood.

Q2: Name the system in the body responsible for the removal of unwanted harmful substances and excess water in the body cells.

Ans: Excretory system

Excretory System

Q3: Name the fluid part of blood.

Ans: Plasma

Q4: Name the three types of cells present in the blood.

Ans: White blood cells, red blood cells and platelets

Q5: Red blood cells, also called RBCs, have iron pigments known as _____________.

Ans: Haemoglobin

Q6: The presence of haemoglobin gives red colour to blood.True/ False.

Ans: True

Q7: White blood cells, or WBCs, defend the body against ___________________.

Ans: Infection

Q8: When a blood vessel is cut, blood comes out immediately. After some time, a dark red clot is formed on the cut. Name the cell responsible for this.

Ans: Platelets

Q9: Name the two types of blood vessels

Ans: Arteries and vein

Q10: Which of the two carry oxygen-rich blood, arteries or veins?

Ans: Arteries 

Q11: A number of capillaries together form a ___________

Ans: Vein

Q12: Where is the heart located in the human body?

Ans: The heart is located in the chest cavity with its lower parts towards the left.

Q13: Name the vein in the body that carries oxygen-rich blood.

Ans: pulmonary vein

Q14: Pulmonary artery, the only artery in the human body that carries carbon dioxide-rich blood.True/ False.

Ans: True

Q15: What is heartbeat?

Ans: The muscles of the heart contract and relax, which constitutes a heartbeat.

Q16: What is pulse?

Ans: Throbbing that occurs in arteries due to flowing of blood is called pulse or the flow of blood in an artery over a bone is called the pulse.

Q17: The normal pulse rate is

1. 70 to 90 per minute.
2. 70 to 80 per minute.
3. 40 to 70 per minute.
4. 70 to 100 per minute.

Ans: 4. 70 to 100 per minute.

Q18: What is removed along with water as sweat?

Ans: Extra salts are removed along with water as sweat.

Q19: What is the function of valves present in veins?

Ans: Valves are present in veins to prevent backflow of blood in tissues.

Q20: Name the term for transport of food from leaves to other parts of plants

Ans: Translocation

Q21: Name the type of blood vessels which carry blood from organs to the heart.

Ans: Veins

Q22: Name the waste products formed in the body.

Ans: Urea, uric acid and excess water.

Q23: Define excretion.

Ans: The removal of waste products is termed excretion.

Q24: Name organs of excretory system.

Ans: Kidneys, the ureters, the urinary bladder and the urethra.

Q25: Sweat makes the body warm and it helps to maintain normal temperature.True/ False

Ans: False

Q26: What is osmoregulation?

Ans: Osmoregulation is the regulating osmotic pressure of the body fluids by controlling amount of water and salts in the body.

Q27: Heart pumps carbon-dioxide-rich blood to______________and oxygen-rich blood to rest of the __________.

Ans: Lungs and body

Q28: The roots of the plants remain in contact with underground water.True/ False

Ans: True

Q29: What does the xylem transport?

Ans: Xylem-water and minerals

Q30: What does the phloem transport in plants?

Ans: Phloem- prepared food.

Q31: Vena cava transport oxygenated blood or deoxygenated blood?

Ans: deoxygenated blood

Q32: The Transpiration process helps in eliminating extra water from plants.True/ False

Ans: True

Q33: Arteries and veins are joined by a network of ___________________.

Ans: Capillaries

Q34: Kidney eliminates the waste material in the liquid form called as__________________.

Ans: Urine

Q35: Name the main excretory product in human beings.

Ans: Urea

Q36: Water absorption through roots can be increased by keeping the plants

1. in the shade
2. in dim light
3. under the fan
4. covered with a polythene bag

Ans: 1. in the shade

Q37: In plants, water is transported through

1. Xylem
2. Phloem
3. Stomata
4. Root hair

Ans: 1. Xylem

Q38: Name the instrument used to measure blood pressure.

Ans: Sphygmomanometer