When you hold your breath,which of the following blood gas changes leads initially to the urge to breathe again?
A)rising carbon monoxide level
B)rising carbon dioxide level
C)falling carbon monoxide level
D)rising carbon dioxide level and falling carbon monoxide level

Question

Quizplus · Accepted Answer

When you hold your breath, the rising carbon dioxide level in your bloodstream initially triggers the urge to breathe again. This is because carbon dioxide accumulates in the blood and causes an increase in acidity, which leads to a stimulation of the respiratory center in the brain, ultimately resulting in the urge to take a breath. Carbon monoxide, on the other hand, binds with hemoglobin in the blood and reduces its ability to carry oxygen, but it does not directly affect the respiratory center and does not lead to the urge to breathe again.

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