ATI RN
Cardiovascular System Multiple Choice Questions Questions
Question 1 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 2 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 3 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.
Question 4 of 5
What percentage of blood plasma is water?
Correct Answer: B
Rationale: Plasma is ~91.5% water (B), with the rest being proteins, electrolytes, etc. Other options are incorrect per standard physiology.
Question 5 of 5
The process of a white blood cell squeezing between endothelial cells to exit a blood vessel is called
Correct Answer: A
Rationale: Emigration (A) (or diapedesis) is WBC exit from vessels. Diaphysis (B) is bone-related, adhesion (C) is sticking, opsonization (D) enhances phagocytosis.