Choose the CORRECT statement concerning blood vessels.
A. Venules control blood flow through capillaries
B.Arterioles drain blood from capillaries.
C.Veins have thinner walls, but more valves than arteries.
D.Nutrient exchange may occur along arterial vessels.
E. All of the choices are correct
I think B.
Since arteries are closer to the heart, their walls are thicker to stand against the pressure of the heart pumping. Veins have more valves to keep the blood from backing up.
E. All of the choices are correct
Venules do control blood flow through capillaries by constricting or dilating.
Arterioles drain blood from capillaries, leading to venous circulation.
Veins have thinner walls compared to arteries, but they do have more valves, which help prevent backflow of blood.
Nutrient exchange can occur along arterial vessels, specifically in the capillaries where oxygen and nutrients are delivered to tissues while waste products, such as carbon dioxide, are removed.
To determine the correct statement concerning blood vessels, we can examine each option individually:
A. Venules control blood flow through capillaries: This statement is incorrect. Venules are small blood vessels that collect blood from capillaries and carry it to veins. They do not control blood flow through capillaries.
B. Arterioles drain blood from capillaries: This statement is incorrect. Arterioles are small arteries that deliver blood to capillaries, while venules collect blood from capillaries.
C. Veins have thinner walls, but more valves than arteries: This statement is correct. Veins have thinner walls compared to arteries, as they do not need to withstand the high pressure of blood flow. Veins also have valves that prevent the backflow of blood.
D. Nutrient exchange may occur along arterial vessels: This statement is incorrect. Nutrient exchange primarily occurs in capillaries. Arteries are responsible for carrying oxygenated blood away from the heart to the various tissues and organs in the body.
Based on the explanations above, option C is the correct statement. Therefore, the correct answer is C. Veins have thinner walls, but more valves than arteries.