You just ate a huge, delicious breakfast and now are going to head out for your morning run. As you try picking up the pace, you find running to be quite difficult because

A. everywhere in the systemic circuit, blood vessels are constricted.
B. stroke volume is decreased.
C. your heart rate is too high.
D. blood flow to the abdominal organs is dominant.
E. your mean arterial pressure is too high.


Answer: D

Anatomy & Physiology

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