Question

Forced deep breathing for a few minutes by a person sitting at rest may be followed by a temporary cessation of breathing. This is due to

• A. Too much oxygen in blood
• B. Too much carbon dioxide in blood
• C. Both, too much oxygen and very little carbon dioxide in blood
• D. Very little carbon dioxide in blood

Answer 1

The correct option is D Very little carbon dioxide in blood

It is known that cessation of breathing, also called as apnea occurs for short periods after very moderate forced breathing and for longer periods when the deep breathing has been more marked.
it happens because of the large loss of CO${}_2$ from the body, resulting in very less CO${}_2$ in the blood.
Therefore, the correct answer is option D.