In the lungs, an example of the body's reserve capacity is that

A) pulmonary blood flow is completely under the control of the autonomic nervous system, dilating arteries and arterioles to adjust blood flow.
B) capillary beds in the lungs are reversibly collapsible, allowing blood to be shunted to additional areas during exercise.
C) some areas of the lung can be closed off during rest and opened again when needed during exercise.
D) All of the statements are true.
E) None of the statements are true.


B) capillary beds in the lungs are reversibly collapsible, allowing blood to be shunted to additional areas during exercise.

Anatomy & Physiology

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