Answers FL-2000310-Biology 1 Sem 2 The Central Nervous System — TestQuestion 11

11

QuizMultiple Choice

The Central Nervous System — Test

Question 11 • FL-2000310-Biology 1 Sem 2

What is the function of the valves within the heart and veins?

Answer

A

to ensure the production of blood within the body

B

to ensure coordination of the heart cells for pumping blood

C

to ensure that foreign materials do not enter the heart

D

to ensure that blood flows in one direction only

Explanation

Valves open to let blood move forward and close to prevent it from flowing backward. This keeps blood moving in one direction through the heart and veins. The correct choice is “to ensure that blood flows in one direction only.”

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