ATI RN
Cardiovascular System Questions and Answers Quizlet Questions
Question 1 of 5
Has the A antigen only and has the B antibody
Correct Answer: A
Rationale: Type A (A) has A antigen, anti-B antibody.
Question 2 of 5
If you are a universal recipient, you
Correct Answer: D
Rationale: Universal recipients (AB+, D) have A/B antigens, no antibodies.
Question 3 of 5
Slight vasodilation in an arteriole prompts a
Correct Answer: C
Rationale: Vasodilation widens the vessel, reducing resistance slightly (C) per Poiseuille’s law (resistance ∝ 1/radius⁴). Increase (A, B) occurs with constriction, huge decrease (D) overstates it.
Question 4 of 5
The ductus venosus is a shunt that allows
Correct Answer: C
Rationale: The ductus venosus (C) shunts oxygenated blood from the umbilical vein to the inferior vena cava, bypassing the liver, into the heart.
Question 5 of 5
The first heart sound represents which portion of the cardiac cycle?
Correct Answer: C
Rationale: The first heart sound (S1) is the closing of AV valves (C) at the start of ventricular systole.