ATI RN
100 Questions on the Cardiovascular System Questions
Question 1 of 5
Identify the vessel(s) that return blood to the left atrium.
Correct Answer: D
Rationale: The left atrium receives oxygenated blood from the lungs via the right and left pulmonary veins (D). The coronary sinus (A, B) drains to the right atrium, and the pulmonary trunk (C) is an artery from the right ventricle.
Question 2 of 5
What causes the semilunar valves to open?
Correct Answer: B
Rationale: Semilunar valves open when ventricular pressure exceeds arterial pressure (B, ~80 mmHg diastolic) during systole. A is the result, C/D don’t open valves.
Question 3 of 5
Place the layers of a blood vessel in order from innermost to outermost layer.
Correct Answer: D
Rationale: Blood vessel layers from innermost to outermost are: tunica intima, tunica media, tunica externa (D). A, B, C reverse or misorder the sequence.
Question 4 of 5
Identify the factors that affect peripheral resistance.
Correct Answer: A
Rationale: Peripheral resistance depends on arterial diameter (major), length, and blood viscosity (A). Cardiac output (B), HR/SV (C), and venous factors (D) influence BP, not resistance directly.
Question 5 of 5
Identify the blood vessel that is generally used to determine blood pressure with a sphygmomanometer.
Correct Answer: C
Rationale: The brachial artery (C) in the upper arm is used with a sphygmomanometer (cuff) to measure BP. Radial (A) is for pulse, subclavian (B) is deep, and carotid (D) is in the neck.