ATI RN
Cardiovascular System Test Questions Questions
Question 1 of 5
Which of the following is not a factor in destroying attacking pathogens?
Correct Answer: D
Rationale: Clotting (D) stops bleeding, not pathogens; others (A, B, C) aid immunity.
Question 2 of 5
Hydrostatic pressure is
Correct Answer: B
Rationale: Hydrostatic pressure (B) is fluid pressure against vessel walls. It’s higher at the arterial end (not A), decreases along the capillary (not zero at midpoint, C), so only B is correct.
Question 3 of 5
Which valve separates the left atrium from the left ventricle?
Correct Answer: A
Rationale: The mitral (bicuspid) valve (A) separates the left atrium and ventricle. Tricuspid (B) is right-sided, pulmonary (C) and aortic (D) are semilunar.
Question 4 of 5
The force the heart must overcome to pump blood is known as
Correct Answer: B
Rationale: Afterload (B) is the resistance (arterial pressure) the heart overcomes to eject blood.
Question 5 of 5
Based on an understanding of nitroglycerin, the nurse administers it for which of the following reasons to a client with angina?
Correct Answer: D
Rationale: Nitroglycerin (D) dilates veins, reducing preload and oxygen demand, relieving angina. It doesn’t increase afterload (A), preload (B), or constrict arteries (C).