ATI LPN
100 Questions on the Cardiovascular System PDF Questions
Question 1 of 5
The layer of blood vessels consisting of an endothelial layer with a basement membrane is the tunica:
Correct Answer: C
Rationale: The tunica intima, or interna, is the innermost layer of blood vessels and consists of an endothelial lining and a basement membrane.
Question 2 of 5
With age, the size of the heart typically and the resting heart rate
Correct Answer: D
Rationale: With age, the heart size increases due to hypertrophy, and resting heart rate decreases due to reduced pacemaker efficiency.
Question 3 of 5
Which of the following correctly lists the sequence of structures that a cardiac action potential follows in order to excite normal contraction of the heart?
Correct Answer: D
Rationale: The correct pathway is: SA node→ AV node→ Bundle of His→ Purkinje fibers, ensuring sequential depolarization and contraction of the heart chambers.
Question 4 of 5
Large arteries in the cranial cavity are called sinuses.
Correct Answer: B
Rationale: Sinuses in the cranial cavity refer to venous sinuses, not arteries; large arteries are not called sinuses.
Question 5 of 5
The saclike structure around the heart is the:
Correct Answer: D
Rationale: The pericardium is the sac enclosing the heart, protecting and lubricating it.