ATI LPN
Cardiovascular Disease NCLEX Questions Questions
Question 1 of 5
Which part of the brain contains the cardiovascular center that regulates heart rate?
Correct Answer: C
Rationale: The medulla oblongata houses the cardiovascular center, which controls autonomic functions such as heart rate and blood pressure regulation.
Question 2 of 5
Which of the following is a semilunar valve?
Correct Answer: A
Rationale: The aortic valve is a semilunar valve, preventing backflow from the aorta.
Question 3 of 5
The first structure that blood leaving the left ventricle passes through is the:
Correct Answer: D
Rationale: Blood leaving the left ventricle passes through the aortic semilunar valve into the aorta.
Question 4 of 5
The semilunar valves open during this part of the cardiac cycle.
Correct Answer: B
Rationale: Semilunar valves open during ventricular contraction, allowing blood to be ejected into the arteries.
Question 5 of 5
Which of the following is true of the conduction system of the heart?
Correct Answer: A
Rationale: The heart's conduction system (e.g., SA node, AV node) is composed of specialized cardiac muscle cells, not nervous tissue, and it generates beats autonomously without requiring external nervous stimuli.