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NCLEX Cardiovascular Questions Quizlet Questions
Question 1 of 5
A rapid, uncoordinated heart beat is called
Correct Answer: C
Rationale: Fibrillation is a rapid, uncoordinated heartbeat, often life-threatening.
Question 2 of 5
Pulse is defined as a(n):
Correct Answer: A
Rationale: Pulse is the rhythmic expansion and recoil of arterial walls due to pressure changes from heartbeats.
Question 3 of 5
Which layer of the heart wall consists of mesothelium and connective tissue?
Correct Answer: A
Rationale: The epicardium (visceral pericardium) consists of mesothelium and connective tissue.
Question 4 of 5
Which structure in the heart initiates action potentials that stimulate contraction of the heart at constant rate of about 100 beats per minute?
Correct Answer: D
Rationale: The sinoatrial (SA) node is the natural pacemaker of the heart, generating rhythmic action potentials that set the heart rate under normal conditions.
Question 5 of 5
The tunica intima of arteries provides a smooth lining with semilunar valves to ensure one-way flow.
Correct Answer: B
Rationale: The tunica intima is a smooth lining, but semilunar valves are in the heart (aortic/pulmonary), not arteries.