ATI RN
Cardiovascular System Anatomy Questions and Answers Questions
Question 1 of 5
Closure of the aortic valve occurs before the following event:
Correct Answer: B
Rationale: Aortic valve closure (S₂) marks the start of isovolumetric relaxation (B), when ventricles relax but valves are closed. A is systole start, C and D are vague.
Question 2 of 5
Contraction of the atria of the heart leads to blood moving directly
Correct Answer: D
Rationale: Atrial contraction pushes blood through atrioventricular valves (D, tricuspid and mitral) into ventricles. Auricles (A) are atrial extensions, arteries (B) and veins (C) are not directly involved.
Question 3 of 5
Which wave in an electrocardiogram represents repolarization of the ventricles?
Correct Answer: B
Rationale: The T wave (B) shows ventricular repolarization. P wave (D) is atrial depolarization, QRS (R, S) is ventricular depolarization.
Question 4 of 5
Heart chamber that pushes blood through the right atrioventricular valve when it contracts
Correct Answer: A
Rationale: The right atrium (A) contracts to push blood through the right AV valve (tricuspid) into the right ventricle during atrial systole. Ventricles (B, D) pump out, left atrium (C) serves the mitral valve.
Question 5 of 5
Another name for the right AV valve
Correct Answer: B
Rationale: The right AV valve is the tricuspid valve (B). Mitral (A) is left AV, aortic (C) and pulmonary (D) are semilunar.