In order to meet the increased oxygen demands of muscle during exercise, two major adjustments in blood flow must be made:
A) an increase in HR and blood pressure.
B) an increase in brain blood flow and blood flow to the skin.
C) an increase in cardiac output and a redistribution of blood flow from inactive tissues to skeletal muscles.
D) an increase in muscle blood flow and an increase in blood flow to the liver.

Question

Quizplus · Accepted Answer

In order to meet the increased oxygen demands of muscle during exercise, the body must increase cardiac output (the amount of blood pumped by the heart per minute) and redistribute blood flow from inactive tissues (such as the digestive system) to skeletal muscles. Choice A is incorrect because an increase in blood pressure is not necessary for increased oxygen demand in muscles. Choice B is incorrect because increased blood flow to the brain and skin are not related to meeting the increased oxygen demands of muscle during exercise. Choice D is incorrect because while there is an increase in blood flow to the muscles, there is not necessarily an increase in blood flow to the liver during exercise.

In Order to Meet the Increased Oxygen Demands of Muscle