ATI RN
NCLEX Practice Questions Cardiovascular System Questions
Question 1 of 5
A patient with high fever will most likely demonstrate the sign of:
Correct Answer: A
Rationale: Fever increases metabolic rate, raising heart rate (A, tachycardia) via sympathetic activation. Appetite (B) decreases, sweating (C) increases, and urinary output (D) may decrease due to dehydration.
Question 2 of 5
Cardiac outputs is maximum to:
Correct Answer: A
Rationale: The liver receives the most blood (~1.5 L/min, A), though kidneys (C, ~1.2 L/min) are close. Brain (B, ~0.75 L/min) and heart (D, ~0.25 L/min) get less.
Question 3 of 5
Identify the pouch-like structure that increases the total filling capacity of the atrium.
Correct Answer: D
Rationale: The auricle is a pouch-like extension of the atrium, increasing its capacity. Ventricle (A) is a chamber, coronary sulcus (B) is a groove, fossa ovalis (C) is a fetal remnant, and interatrial septum (D) divides atria.
Question 4 of 5
During which of the following periods does the largest volume of blood enter the arteries?
Correct Answer: D
Rationale: Ventricular systole (D) ejects the largest volume into arteries (~70 ml/beat). Diastole (A, B) fills chambers, atrial systole (C) adds ~20% to ventricular filling.
Question 5 of 5
If the sinoatrial node is setting the pace for the heartbeat, it will usually be:
Correct Answer: B
Rationale: The SA node typically sets a resting rate of 70-75 bpm (B) under vagal tone, though its intrinsic rate is ~100 bpm.