Max works out about an hour every day using aerobic machines at a gym. During his moderate physical exercise, blood concentrations of
A)oxygen and carbon dioxide increase.
B)oxygen and carbon dioxide remain nearly unchanged.
C)oxygen decrease and carbon dioxide increase.
D)oxygen increase and carbon dioxide decrease.

Question

Quizplus · Accepted Answer

During moderate physical exercise, blood concentrations of oxygen and carbon dioxide remain nearly unchanged. This is because the body is able to efficiently regulate the exchange of gases in the lungs and tissues to meet the increased demand for oxygen and removal of carbon dioxide. If the exercise intensity increases to high intensity, there can be a temporary increase in carbon dioxide and decrease in oxygen due to the body's inability to keep up with the demand.

Max Works Out About an Hour Every Day Using Aerobic