MEDIUM
7th CBSE
IMPORTANT
Earn 100

Draw a well labelled diagram of human respiratory system. Name the part where exchange of gases takes place in our body. How does this process occur?

Important Questions on Respiration in Plants and Animals

MEDIUM
7th CBSE
IMPORTANT
Why is it better to think of organisms as energy-transforming machines rather than energy-using machines?
EASY
7th CBSE
IMPORTANT
Why does respiration take place in every living cell all the time?
HARD
7th CBSE
IMPORTANT

Study the given diagram showing the section through an alveolus and capillary.

Which of the following best describes the concentration of oxygen at X, Y and Z.

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EASY
7th CBSE
IMPORTANT

The following are the two pie charts which give the percentage of compositions found in exhaled air and inhaled air.

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Explain the following terms

i. Inhaled air

ii. Exhaled air

HARD
7th CBSE
IMPORTANT

The following are the two pie charts which give the percentage of compositions found in exhaled air and inhaled air.

Which pie chart is most likely taken from a sample of exhaled air?

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MEDIUM
7th CBSE
IMPORTANT

The following are the two pie charts which give the percentage of compositions found in exhaled air and inhaled air.

Question Image

Which pie chart is most likely taken from the sample of exhaled air? Explain our answer?

MEDIUM
7th CBSE
IMPORTANT

The following are the two pie charts which give the percentage of compositions found in exhaled air and inhaled air.

Question Image

Write the word equation below to represent the chemical reaction taking place in living cells that contributes to the different compositions in the exhaled air.