Multiple Choice
A major difference between venules and arterioles is that:
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Veins
Multiple Choice
Which of the following is not a reason that veins need valves to prevent backflow, but arteries do not?
A
Arteries have thicker walls than veins, providing a natural resistance to backflow.
B
Veins require valves to prevent gravity from causing backflow when blood is transported up to the heart.
C
Arteries have higher blood pressure, reducing the likelihood of backflow when they transport blood upward.
D
All of the above are correct reasons for veins requiring valves.
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