Question

question 3 of 10
how do skeletal muscles contribute to blood flow?
a. skeletal muscles increase the blood pressure in arteries.
b. skeletal muscles force blood in veins to return to the heart.
c. skeletal muscles force the blood in capillaries into cells.
d. skeletal muscles prevent blood in arteries from traveling backward.

Explanation:

Veins have one - way valves. When skeletal muscles contract, they squeeze the veins. This squeezing action, along with the one - way valves, helps push the blood in veins back towards the heart. Arteries have a different mechanism for blood flow (related to the heart's pumping action and elastic recoil). Capillaries are for exchange between blood and tissues, not a direct role of skeletal muscles in moving blood there. And skeletal muscles do not directly prevent blood in arteries from flowing backward as that is mainly due to the structure of the heart valves and arterial properties.

Answer:

C. Skeletal muscles force blood in veins to return to the heart.