During Exercise, Cardiac Output Increases Dramatically, but Mean Arterial Blood

question 63

Multiple Choice

During exercise, cardiac output increases dramatically, but mean arterial blood pressure rises very little. Why is this so?

• A) Venules constrict, increasing vascular resistance.
• B) Arterioles dilate, decreasing vascular capacity.
• C) Arterioles constrict, increasing vascular resistance.
• D) Muscle vessels dilate, increasing vascular capacity.

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