ATI RN
Cardiovascular System Multiple Choice Questions Questions
Question 1 of 5
Under resting condition, the cardiac output is:
Correct Answer: C
Rationale: Resting cardiac output is ~5.25 L/min (C, 70 ml × 75 bpm). A and B are too low, D too high for rest.
Question 2 of 5
Which of the following blood vessel is used to distribute oxygenated blood to the myocardium?
Correct Answer: A
Rationale: Coronary arteries (A) supply oxygenated blood to the myocardium. Coronary veins (B) and sinus (C) drain deoxygenated blood, pulmonary artery (D) carries deoxygenated blood to lungs.
Question 3 of 5
Cardiac output is the volume of blood ejected from the ventricle into the each minute.
Correct Answer: C
Rationale: Cardiac output (C) is total blood ejected per minute from both ventricles: left to aorta, right to pulmonary trunk (~5 L/min).
Question 4 of 5
Blood vessel that carries blood from the lungs to the heart
Correct Answer: B
Rationale: Pulmonary veins (B) carry oxygenated blood from the lungs to the left atrium. Pulmonary artery (A) is to lungs, aorta (C) is systemic, coronary sinus (D) drains heart.
Question 5 of 5
Which of the following most accurately describes the order of the cardiac conduction system?
Correct Answer: C
Rationale: The correct order is SA node (initiates), AV node (delays), bundle of His, Purkinje fibers (C), ensuring atrial then ventricular contraction.