ATI RN
Cardiovascular System Practice Questions Questions
Question 1 of 5
Within the circulation, where is blood pressure highest?
Correct Answer: B
Rationale: Blood pressure is highest in the left ventricle (B) during systole (~120 mmHg), as it pumps into the aorta. The right ventricle (C) peaks at ~25 mmHg, pulmonary artery (D) is lower, vena cava (A) is near 0 mmHg, and left atrium (E) is ~8-12 mmHg.
Question 2 of 5
The condition in which the AV node fails and the electrical stimulus does not reach the ventricles is called a(an)
Correct Answer: A
Rationale: Heart block (A) occurs when AV node failure prevents impulse transmission to ventricles (e.g., third-degree block). MI (B) is tissue death, arrhythmia (C) is irregular rhythm, and ectopic pacemaker (D) is an abnormal impulse source.
Question 3 of 5
If you stand up too quickly and blood pressure drops, baroreceptors in the carotid arteries will signal the cardioregulatory center to send
Correct Answer: D
Rationale: Baroreceptors detect low BP and signal the medulla to send sympathetic signals (D) to increase heart rate and vasoconstriction, restoring BP. Parasympathetic (A, B) slows HR, C opposes the response.
Question 4 of 5
Compared to tissue fluid, the osmotic pressure of blood is typically ___; thus water moves into the ___
Correct Answer: A
Rationale: Blood’s osmotic pressure (oncotic, ~25 mmHg) is greater than tissue fluid’s due to plasma proteins (A), drawing water back into capillaries at the venous end. B, C, D mismatch osmosis direction.
Question 5 of 5
The vasomotor center that controls the diameter of blood vessels is located in the
Correct Answer: A
Rationale: The vasomotor center in the medulla oblongata (A) regulates vessel diameter via sympathetic signals. Pons (B), cerebrum (C), and cerebellum (D) have other roles.