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NCERT Solutions for Class 7th Science


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Chapter 10. Respiration in Organisms

Additional Questions With Solutions




Additional Questions With Solutions

Ques: What is cellular respiration?
Ans: The process of breakdown of food in the cell with the release of energy is called cellular respiration.

Ques: Where does cellular respiration take place?
Ans: It take place in the cells of organisms.

Ques: Write the name of respiratory organs of earthworm.
Ans:  Skin.`
Ques: Write the differences between aerobic respiration and anaerobic respiration.

Ques: What is aerobic respiration ?
Ans: Breakdown of glucose occurs with the use of oxygen.
It is called aerobic respiration.

Ques: What is anaerobic respiration?
Ans: food can also be broken down, without using oxygen. This is called anaerobic respiration.

Ques: What are anaerobes?
Ans: Some organisms such as yeast that can survive in the
Absence of air. they are called anaerobes.

Ques: Why do you get muscle cramps after heavy exercise?
Ans: There begins to lack of oxygen during heavy exercise and muscle cells respire anaerobically by which glucose produces lactic acid. The accumulation of lactic acid causes muscle cramps.

Ques: Why do we get relief from cramps after a hot water bath or a massage.
Ans: The blood circulation increases after a hot water bath or a massage. As a result, the supply of oxygen to the muscle cells increases by which there takes place the complete breakdown of lactic acid into carbon dioxide and water.

Ques: What are spiracles?
Ans: Other insects also have similar opening. These opening are called spiracles.

Ques: What are tracheae?
Ans: Insects have a network of air tubes called tracheae.

Ques: What is inhalation?
Ans: The taking in air rich in oxygen into the body is called

Ques: What is exhalation?
Ans: Giving out of air rich in carbon dioxide is known as exhalation.

Ques: What is breathing rate?
Ans: The time of time a person breathes in a minute is termed As the breathing rate.

Ques: What is breathing rate in an adult?
Ans: 15-18 times.

Ques: Why do we yawn?
Ans: When reduce our respiratory rate we do not get enough oxygen hence yawns comes again and again for completing the oxygen demand and we take deep breaths.  


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