ATI LPN
100 Questions on the Cardiovascular System Questions
Question 1 of 5
Stimulation of which nerve reduces heart rate?
Correct Answer: D
Rationale: The vagus nerve carries parasympathetic signals that decrease heart rate and cardiac output, promoting relaxation and energy conservation.
Question 2 of 5
The chamber of the heart that normally has the thickest wall is the:
Correct Answer: D
Rationale: The left ventricle has the thickest wall to pump blood into the systemic circulation.
Question 3 of 5
Diminished blood flow to an organ or tissue that reduces the oxygen level and impairs cell function is called:
Correct Answer: A
Rationale: Ischemia refers to diminished blood flow leading to reduced oxygen levels and impaired cellular function.
Question 4 of 5
During the cardiac cycle, the second heart sound is heard during:
Correct Answer: B
Rationale: The second heart sound occurs during ventricular relaxation when the semilunar valves close.
Question 5 of 5
Peripheral resistance to blood flow comes about because of:
Correct Answer: A
Rationale: Peripheral resistance arises primarily from friction between blood and vessel walls, especially in arterioles, where resistance is highest due to their small diameter.