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:
Pulmonary vein.
Pulmonary artery.
Aorta.
Inferior vena cava.
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Requesting a prescription for an analgesic for the client is a part of conventional medical treatment.
Choice B rationale:
Checking the client’s oxygen saturation level is a part of conventional medical treatment.
Choice C rationale:
Encouraging the client to take slow, deep breaths can help manage pain and is a holistic nursing approach.
Choice D rationale:
Obtaining blood work from the client is a part of conventional medical treatment.
Correct Answer is B
Explanation
Choice A rationale:
Checking for a positive Chvostek’s sign is not relevant. This sign is associated with hypocalcemia, not with the lab values provided.
Choice B rationale:
The nurse should request a potassium replacement. The normal range for potassium is 3.5-5.0 mEq/L. A level of 3.0 mEq/L is low, indicating hypokalemia.
Choice C rationale:
Administering glucagon IM is not appropriate. The glucose level is within the normal range (70-110 mg/dL), so there is no need for glucagon.
Choice D rationale:
Discontinuing the TPN infusion is not the first action. The nurse should address the abnormal lab value (low potassium) first.
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