ATI RN
Cardiovascular System Anatomy Questions and Answers Questions
Question 1 of 5
The longest vein in the human body is:
Correct Answer: C
Rationale: The long saphenous vein (C), from foot to thigh, is the longest (~70-100 cm). Inferior vena cava (A) is shorter (~20 cm), subclavian (B) and jugular (D) are smaller.
Question 2 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 3 of 5
In determining blood pressure by auscultatory method the first sound indicates:
Correct Answer: C
Rationale: The first Korotkoff sound (C) marks systolic pressure (~120 mmHg) as the cuff pressure drops below arterial peak. A is last sound, B and D are incorrect.
Question 4 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 5 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.