ATI LPN
Cardiovascular Questions Questions
Question 1 of 5
What is the O2 consumption of a beating heart at rest?
Correct Answer: D
Rationale: The oxygen consumption of a resting heart is approximately 9 ml/100g/min.
Question 2 of 5
The systemic circulation includes all of the following structures except one. Which is the exception?
Correct Answer: D
Rationale: The pulmonary vein is part of the pulmonary circulation, not the systemic circulation.
Question 3 of 5
Identify the outermost layer of the pericardial membranes.
Correct Answer: A
Rationale: The fibrous pericardium is the outermost layer of the pericardial membranes, providing a tough protective covering.
Question 4 of 5
The SA node is located:
Correct Answer: B
Rationale: The SA node is located in the upper right atrium near the superior vena cava.
Question 5 of 5
The muscular layer of the blood vessel wall is the
Correct Answer: B
Rationale: The tunica media, composed primarily of smooth muscle, is responsible for regulating vessel diameter and controlling blood flow and pressure.