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NCLEX Cardiovascular Questions Quizlet Questions
Question 1 of 5
Which of the following statements is true regarding heart rate regulation?
Correct Answer: A
Rationale: The vagus nerve (parasympathetic) releases acetylcholine to slow the heart rate. Cardiac nerves (sympathetic) increase heart rate, and acetylcholine does not increase it, making only A true.
Question 2 of 5
The rate of blood flow to the 'entire body' increases significantly during exercise. Explain briefly how the heart achieves this.
Correct Answer: D
Rationale: The heart boosts output through combined increases in rate and stroke volume.
Question 3 of 5
Purkinje fibers are found in:
Correct Answer: A
Rationale: Purkinje fibers, part of the conduction system, are located in the endocardium of the heart.
Question 4 of 5
Which of the following heart murmurs is heard during systole?
Correct Answer: D
Rationale: Patent ductus arteriosus causes a continuous murmur, but it's loudest in systole, fitting the systolic category.
Question 5 of 5
Sympathetic stimulation of the heart:
Correct Answer: D
Rationale: Sympathetic stimulation releases norepinephrine, increasing heart rate and contractility.