Question

1. what happens to carbon dioxide during the process of exhalation?

it is converted into oxygen.
it is released into the bloodstream.
it is expelled from the body.
it is stored in the alveoli.

Explanation:

To answer this, we analyze each option:

• "It is converted into oxygen": Exhalation doesn't convert CO₂ to O₂ (that's photosynthesis in plants).
• "It is released into the bloodstream": CO₂ is transported in the blood to be exhaled, not released into it during exhalation.
• "It is expelled from the body": Exhalation is the process of breathing out, where CO₂ (a waste product of respiration) is removed from the body.
• "It is stored in the alveoli": Alveoli are for gas exchange, not storage of CO₂.

So the correct description of what happens to CO₂ during exhalation is that it's expelled from the body.

Answer:

C. It is expelled from the body. (Note: Assuming the options are labeled A, B, C, D with the third option as C. If the original labeling is different, adjust the identifier, but the text "It is expelled from the body" is the correct choice.)