Olympic wrestlers grapple with each other for relatively short but intense periods, relying on powerful skeletal muscles in their arms and legs to pin their opponents.What changes might you expect to see in their circulatory systems during the match?
A) Activation of the parasympathetic system
B) A carefully maintained, constant stroke volume
C) A decrease in norepinephrine secretion
D) An increase in blood flow to the gut
E) Relaxation of arterioles serving capillaries in the arms and legs

Question

Quizplus · Accepted Answer

During intense physical activity, such as wrestling, the body increases blood flow to active muscles (in this case, in the arms and legs) to meet the increased demand for oxygen and nutrients. This is achieved by the relaxation of arterioles serving the capillaries in those muscles, allowing more blood to flow through them.

Olympic Wrestlers Grapple with Each Other for Relatively Short but Intense