The pulmonary valve prevents the backflow of blood into the right ventricle after it has been pumped into the pulmonary artery, ensuring that deoxygenated blood can flow into the lungs for oxygenation. Choices A, C, and D describe the functions of the tricuspid valve, mitral valve, and aortic valve, respectively.

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The Pulmonary Valve

Question 172

Multiple Choice

The pulmonary valve:

A) stops the backflow of blood between the right atrium and right ventricle
B) prevents the flow of blood back into the right ventricle and opens to allow deoxygenated blood to flow through the pulmonary artery into the lungs
C) allows blood to flow from the left atrium into the left ventricle
D) opens to allow blood to exit the left ventricle and flow into the aorta when the pressure in the left ventricle rises above the pressure in the aorta

Correct Answer: