ATI LPN
NCLEX Cardiovascular Questions Questions
Question 1 of 5
Place the layers of a blood vessel in order from innermost to outermost layer.
Correct Answer: D
Rationale: The correct order of blood vessel layers from innermost to outermost is tunica intima, tunica media, and tunica externa.
Question 2 of 5
Which of the following terms identifies the anatomical region found between the lungs that extends from the sternum to the vertebral column and from the first rib to the diaphragm?
Correct Answer: D
Rationale: The mediastinum is the central region between the lungs, containing the heart and other structures.
Question 3 of 5
In comparison to skeletal muscle fibers, the contractile fibers of the heart are depolarized for_____ period of time.
Correct Answer: B
Rationale: Cardiac muscle cells remain depolarized for a longer period due to the plateau phase of the action potential, which helps sustain contraction and prevent tetanus.
Question 4 of 5
One function of the pericardial sac is protection against friction.
Correct Answer: A
Rationale: The pericardial sac contains fluid to reduce friction between the heart and surrounding structures during movement.
Question 5 of 5
Which of the following is another name for the visceral layer of the pericardium?
Correct Answer: B
Rationale: The visceral pericardium is also called the epicardium, adhering to the heart's surface.