Question

Muscles require oxygen to produce the usable energy that causes muscles to move. Blood flow supplies oxygen to mus‹ cells during exercise. Which of the following describes how exercise affects this flow of blood to the muscles?

© Exercise results in an increased heart rate, which causes the blood flow to slow down.
© Exercise promotes the loss of water through sweat, which causes the blood flow to speed up.
© Exercise causes the widening of the blood vessels, which leads to an increase in the flow of blood.
© Exercise triggers valves in the blood vessels to open, which leads to a decrease in the flow of blood.

Answer 1

Answer:

Exercise causes the widening of the blood vessels

which leads to an increase in the flow of blood

Step-by-step explanation:

Exercise causes the widening of the blood vessels, which leads to an increase in the flow of blood. This process is known as vasodilation. During exercise, the body's demand for oxygen and nutrients increases, and the muscles require more blood flow to meet this demand. Vasodilation occurs in response to the release of chemicals such as nitric oxide, which causes the smooth muscle in the walls of blood vessels to relax, allowing them to widen and increase blood flow. Therefore, option (C) is the correct answer. Options (A), (B), and (D) are incorrect because they do not accurately describe the effects of exercise on blood flow to muscles.