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A patient with CAD is asking the nurse about the mechanisms of the heart.
It would be appropriate for the nurse to respond that when the left ventricle contracts, it pushes blood through the semilunar valve to the:

A.

Pulmonary vein.

B.

Pulmonary artery.

C.

Aorta.

D.

Inferior vena cava.

Answer and Explanation

The Correct Answer is C

Choice A rationale:

This statement is incorrect because the pulmonary vein carries oxygenated blood from the lungs to the left atrium, not from the left ventricle.

Choice B rationale:

This statement is incorrect because the pulmonary artery carries deoxygenated blood from the right ventricle to the lungs, not from the left ventricle.

Choice C rationale:

This statement is correct. When the left ventricle contracts, it pushes blood through the aortic semilunar valve into the aorta, the largest artery in the body.

Choice D rationale:

This statement is incorrect because the inferior vena cava carries deoxygenated blood from the lower half of the body to the right atrium, not from the left ventricle.


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Related Questions

Correct Answer is B

Explanation

Choice A rationale:

Repeating the potassium level is not the first action to take. The nurse already has a recent lab value.

Choice B rationale:

The nurse should withhold the medication. The normal range for potassium is 3.5-5.0 mEq/L. A level of 5.5 mEq/L is high, so giving more potassium could lead to hyperkalemia.

Choice C rationale:

Monitoring for paresthesia is important in hyperkalemia, but it is not the first action. The nurse should first prevent further increase in potassium levels.

Choice D rationale:

Administering a hypertonic solution is not relevant in this situation. It does not directly address the high potassium level.

Correct Answer is B

Explanation

Choice A rationale:

Placing the client in a modified Trendelenburg position is not the first action to take when managing a heavily bleeding wound.

Choice B rationale:

Applying direct pressure to the wound is the first action to take to control bleeding.

Choice C rationale:

Elevating the extremity can help control bleeding, but it is not the first action to take.

Choice D rationale:

Applying a tourniquet is a last resort when other methods of controlling bleeding have failed.

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