ATI RN
Cardiovascular System Anatomy Questions and Answers Questions
Question 1 of 5
In the heart, valves that ensure one-way flow of blood are found:
Correct Answer: D
Rationale: Valves ensure one-way flow at two key locations: atrioventricular (AV) valves (A) between atria and ventricles (tricuspid, mitral), and semilunar valves (B) between ventricles and arteries (pulmonary, aortic). No valves exist between vena cavae and atria (C), so D (A and B) is correct.
Question 2 of 5
List the components of the cardiac conduction system in the correct sequence for impulse transmission.
Correct Answer: C
Rationale: The conduction sequence is: SA node (pacemaker), AV node (delay), AV bundle (His), bundle branches, Purkinje fibers (C). A, B, and D misorder the sequence.
Question 3 of 5
The volume of blood pumped by a ventricle per minute is the
Correct Answer: A
Rationale: Cardiac output (A) is the volume pumped per minute (CO = HR × SV, ~5 L/min). Stroke volume (B) is per beat, C/D are not standard terms.
Question 4 of 5
Which of the following is NOT true of artery structure and function?
Correct Answer: A
Rationale: Arteries carry blood away from the heart (A is false). The tunica media is thicker (B), arterioles regulate BP (C), and arteries expand/recoil (D) with each beat.
Question 5 of 5
Identify the two primary factors that determine blood pressure.
Correct Answer: B
Rationale: BP is determined by cardiac output (CO) and peripheral resistance (PR) (B, BP = CO × PR). A affects PR, C determines CO, D is secondary.