ATI RN
NCLEX Practice Questions Cardiovascular System Questions
Question 1 of 5
A rapid, uncoordinated heart beat is called
Correct Answer: C
Rationale: Fibrillation (C) is rapid, uncoordinated beating (e.g., atrial or ventricular). Heart block (A) is conduction failure, tachycardia (B) is fast but coordinated, and bradycardia (D) is slow.
Question 2 of 5
Blood flows the fastest in
Correct Answer: B
Rationale: Blood flows fastest in arteries (B, ~300-500 mm/s) due to high pressure and large diameter. Capillaries (C, ~0.3 mm/s), venules (A), and arterioles (D) are slower due to smaller size or lower pressure.
Question 3 of 5
Angiotensin II increases blood pressure by increasing:
Correct Answer: A
Rationale: Angiotensin II constricts arterioles and stimulates aldosterone release (A), increasing BP via resistance and volume. B, C, D mismatch its effects.
Question 4 of 5
What vessels drain blood from the kidneys?
Correct Answer: C
Rationale: Renal veins (C) drain blood from the kidneys to the inferior vena cava. Hepatic veins (A) drain the liver, jugulars (B) the head, and iliac arteries (D) supply blood.
Question 5 of 5
Aorta pierces the diaphragm at the level of:
Correct Answer: C
Rationale: The aorta passes through the diaphragm at the aortic hiatus, level T12 (C). T8 (A) is the inferior vena cava, T10 (B) the esophagus, and C6 (D) is cervical.