When you hold your breath,which of the following blood gas changes leads initially to the urge to breathe again?

Question

Quizplus · Accepted Answer

The urge to breathe again is triggered by increasing levels of carbon dioxide in the bloodstream, not decreasing levels of oxygen. When you hold your breath, oxygen is used up by the body and carbon dioxide accumulates. The rising carbon dioxide concentration stimulates chemoreceptors in the brain, which sends signals to the body to breathe again. Therefore, choice B (rising carbon dioxide concentration) is the best answer.

When You Hold Your Breath,which of the Following Blood Gas