ATI RN
100 Questions on the Cardiovascular System PDF Questions
Question 1 of 5
Identify the chamber of the heart with the thickest wall.
Correct Answer: B
Rationale: The left ventricle (B) has the thickest wall (~10-15 mm) to pump blood against high systemic resistance (~120 mmHg). The right ventricle (D) is thinner (~4-5 mm) for pulmonary circulation (~25 mmHg), and atria (A, C) are thinnest as they only pump to ventricles.
Question 2 of 5
During atrial systole, the atria are ___ the ventricles are ___ the AV valves are ___ and the SL valves are ___
Correct Answer: B
Rationale: During atrial systole, atria contract, ventricles relax, AV valves are open (filling ventricles), and semilunar (SL) valves are closed (B). A is ventricular systole, C/D mismatch phases.
Question 3 of 5
The muscular layer of the blood vessel wall is the
Correct Answer: B
Rationale: The tunica media (B) is the muscular layer, containing smooth muscle for vasoconstriction/dilation. Tunica externa/adventitia (A, C) is connective tissue, tunica interna (D) is endothelium.
Question 4 of 5
A measure of the arterial blood pressure over time is the
Correct Answer: A
Rationale: Mean arterial pressure (MAP, A) averages arterial BP over time (MAP = diastolic + 1/3 pulse pressure). Stroke volume (B) is volume, resistance (C) is a factor, and pulse pressure (D) is systolic-diastolic.
Question 5 of 5
Two of the more common pulse points are the:
Correct Answer: A
Rationale: Common pulse points are the carotid (neck) and radial (wrist) arteries (A). Ulnar (B, D) is less common, and jugular (C) is a vein, not an artery.