The strongest stimulus for breathing is blood with a:
A)high level of oxygen
B)low level of oxygen
C)low level of carbon dioxide
D)high level of carbon dioxide

Question

Quizplus · Accepted Answer

The strongest stimulus for breathing is an elevated level of carbon dioxide in the blood. This is because carbon dioxide is a waste product of cellular respiration and when it builds up in the bloodstream, it lowers blood pH and triggers the respiratory center in the brainstem to increase the rate and depth of breathing in order to eliminate excess carbon dioxide and restore blood pH to normal levels.

The Strongest Stimulus for Breathing Is Blood with A