ATI RN
Cardiovascular System Anatomy Questions and Answers Questions
Question 1 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 2 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 3 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.
Question 4 of 5
The path of systemic circulation begins at the:
Correct Answer: B
Rationale: Systemic circulation begins at the left ventricle (B), pumping oxygenated blood into the aorta. Left atrium (A) fills it, right side (C, D) is pulmonary circulation.
Question 5 of 5
Identify the fetal structures that help circulation to by-pass the lungs.
Correct Answer: B
Rationale: The ductus arteriosus (shunts pulmonary artery to aorta) and foramen ovale (right to left atrium, B) bypass the fetal lungs. Ductus venosus (A) bypasses liver, umbilical vessels (C, D) connect to placenta.