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Plant Respiration and Intercellular Gas Exchange

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Plant Respiration and Intercellular Gas Exchange

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Questions and Answers

Where does intercellular gas exchange take place in a leaf?

In the stomata

Between the spongy mesophyll layer (correct)

Within the palisade layer

In the guard cells

What causes stomatal opening and closing?

Temperature fluctuations

Photosynthesis activity

Water potential of the leaf

Changes in the turgor of the guard cells (correct)

How do guard cells open the stomata?

Due to an increase in carbon dioxide concentration

By losing water and becoming flaccid

By absorbing excess oxygen

By actively accumulating potassium ions (correct)

Where does gas exchange also occur in plants besides leaves?

Stems and roots Signup and view all the answers

How do woody plant stems facilitate gas exchange?

Through lenticels Signup and view all the answers

What is the main purpose of respiratory systems in animals?

Remove carbon dioxide from cells Signup and view all the answers

How is ventilation defined in the context of breathing?

The mechanics of breathing in and out Signup and view all the answers

Why does air enter the lungs during inhalation?

To lower the air pressure in the lungs Signup and view all the answers

What happens to oxygen when it diffuses into the blood stream?

It diffuses out of the capillary and into cells Signup and view all the answers

Why does carbon dioxide diffuse from the blood into the alveoli?

Due to a higher concentration of carbon dioxide in the blood compared to the lungs Signup and view all the answers