Class 7 Exam > Class 7 Notes > Short & Long Answer Questions for Class 7 > Short Question Answer: Respiration in Organisms
Class 7 Science Chapter 6 Question Answers - Respiration in Organisms
Q1: Why does athlete breathe faster and deeper than usual after finishing the race?
Ans: An athlete needs more energy during the race and after. Since demand for the energy is high the breakdown of food must be speeded up. This requires more oxygen to be supplied. This is why an athlete not only breathes fast, but also take deep breathes and thus inhale more oxygen.
Q2: List the similarities and differences between aerobic and anaerobic respiration.
Ans: The following table shows the similarities and differences between aerobic and anaerobic respiration:
| Aerobic Respiration | Anaerobic Respiration |
|
|
Q3: Why we often sneeze when we inhale a lot of dust-laden air?
Ans: The air around us has various types of unwanted suspended particles like- smoke, dust, pollens etc. When we inhale these particles get trapped in the hair present in our nasal cavity. However, sometimes these particles may get past the hair present in our nasal cavity. Then they irritate the lining of the cavity as a result of which we sneeze. Sneezing expels these foreign particles from the inhaled air and a dust-free, clean air enters our body.
Q4: Tick the correct answer:
a. In cockroaches air enters the body through
- lungs
- gills
- spiracles
- skin
b. During heavy exercise, we get cramps in the legs due to the accumulation of
- carbon dioxide
- lactic acid
- alcohol
- water
c. Normal range of breathing rate per minute in an average adult person at rest is -
- 9-12
- 15-18
- 21-24
- 30-33
d. During exhalation, the ribs
- move outwards
- move downwards
- move upwards
- do not move at all
Ans: a-3,b-2,c-2,d-2
Q5: Match the items in Column I with those in Column II:
| Column I | Column II |
|
|
Ans: 1-c, 2-d, 3-a, 4-e, 5-b, 6-d,
Q6: Mark true (T) and false (F)
- During heavy exercise the breathing rate of a person slows down. (F)
- Plants carry out photosynthesis only during the day and respiration only at night. (F)
- Frogs breathe through their skins as well as their lungs. (T)
- The fishes have lungs for respiration. (F)
- The size of the chest cavity increases during the inhalation. (T)
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FAQs on Class 7 Science Chapter 6 Question Answers - Respiration in Organisms
| 1. What is respiration in organisms? |  |
Ans. Respiration in organisms is the process by which they obtain energy from the food they eat. It involves the intake of oxygen and the release of carbon dioxide.
| 2. How is respiration different from breathing? | |
Ans. Respiration and breathing are often used interchangeably, but they are not the same. Breathing is the physical act of inhaling and exhaling air, while respiration refers to the chemical process that takes place in cells to produce energy.
| 3. What are the different types of respiration in organisms? | |
Ans. There are two main types of respiration in organisms: aerobic respiration and anaerobic respiration. Aerobic respiration occurs in the presence of oxygen and is the most common type, while anaerobic respiration occurs in the absence of oxygen.
| 4. How does respiration take place in organisms? | |
Ans. Respiration takes place in organisms through a series of chemical reactions that occur in the cells. It starts with the intake of oxygen and the breakdown of glucose to release energy. Carbon dioxide is produced as a waste product and is expelled from the body.
| 5. Why is respiration important for organisms? | |
Ans. Respiration is essential for organisms as it provides them with the energy they need to carry out various life processes. It allows cells to convert glucose into usable energy in the form of ATP (adenosine triphosphate), which is required for growth, movement, reproduction, and other vital functions.
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