Class 7 Exam > Class 7 Notes > Science Class 7 > Worksheet: Respiration in Organisms
Respiration in Organisms Class 7 Worksheet Science Chapter 6
Q.1. True/False
(i) During heavy exercise the breathing rate of a person slows down.
(ii) Gills are well supplied with blood vessels for exchange of gases.
(iii) Plants carry out photosynthesis only during the day and respiration only at night.
(iv) Frogs breathe through their skins as well as their lungs.
(v) The fishes have lungs for respiration.
(vi) The size of the chest cavity increases during inhalation.
Q.2. Fill in the blanks.
(i) In cockroaches, air enters the body through ____.
(ii) During heavy exercise, we get cramps in the legs due to the accumulation of ____.
(iii) Normal range of breathing rate per minute in an average adult person at rest is ____.
(iv) During exhalation, the ribs move ____.
(v) Breathing is a part of the process of ____.
Q.3. What forms the floor of the chest cavity?
Q.4. What is produced during anaerobic respiration in muscles that causes cramps?
Q.5. Lactic acid is produced during anaerobic respiration in muscles that causes cramps.
Q.6. What happens during exhalation?
Q.7. When and where does anaerobic respiration occur in humans?
Q.8. Why do we get relief from cramps after a hot water bath or a massage?
Q.9. What is cell?
Q.10. Name the respiratory organ of birds.
Q.11. What are the end products of anaerobic respiration?
Q.12. What is cellular respiration?
Q.13. What role does hair present in the nasal cavity play in the process of respiration?
Q.14. Why do we get muscle cramps after heavy exercise?
Q.15. What happens during inhalation?
Q.16. How does exchange of gases take place in insects?
Q.17. What is the percentage of oxygen and carbon dioxide in inhaled and exhaled air?
Q.18. How do we breathe?
Q.19. What are some common uses of Yeast?
Q.20. How do earthworms breathe?
You can find Worksheets Solutions here: Worksheet Solutions: Respiration in Organisms
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FAQs on Respiration in Organisms Class 7 Worksheet Science Chapter 6
| 1. What is respiration in organisms? |  |
Ans. Respiration in organisms is the process by which cells obtain energy from food and release carbon dioxide as a waste product. It involves the intake of oxygen and the release of energy through a series of chemical reactions.
| 2. How do organisms breathe? | |
Ans. Organisms breathe through a process called breathing or respiration. In this process, they inhale oxygen-rich air or water, which enters their body through specialized respiratory organs like lungs or gills. Oxygen is then transported to the cells where it is used for energy production, and carbon dioxide, a waste product, is expelled.
| 3. What is the difference between aerobic and anaerobic respiration? | |
Ans. Aerobic respiration is a type of respiration that occurs in the presence of oxygen and is more efficient in terms of energy production. It involves the breakdown of glucose into carbon dioxide and water, releasing a large amount of energy.
On the other hand, anaerobic respiration is a type of respiration that occurs in the absence of oxygen. It is less efficient and produces a smaller amount of energy. Anaerobic respiration can occur in organisms like bacteria and yeast and produces substances like ethanol or lactic acid as by-products.
| 4. How does respiration take place in plants? | |
Ans. Plants respire through tiny openings called stomata present on the surface of their leaves. These stomata allow the exchange of gases between the plant and the environment. During respiration, plants take in oxygen and release carbon dioxide. However, plants also carry out photosynthesis, where they take in carbon dioxide and release oxygen. Therefore, during the day, when photosynthesis is more active, plants release more oxygen than they consume. At night, when photosynthesis stops, plants consume oxygen and release carbon dioxide.
| 5. Why is respiration important for living organisms? | |
Ans. Respiration is important for living organisms as it provides them with the energy required for various life processes. Through respiration, cells in the body break down glucose and other organic molecules, releasing energy that is stored in the form of ATP (adenosine triphosphate). This energy is used for activities like growth, movement, reproduction, and maintaining the body's internal environment. Without respiration, organisms would not be able to carry out these essential functions and survive.
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