ATI LPN
100 Questions on the Cardiovascular System PDF Questions
Question 1 of 5
Explain the reason there is a delay in processing the electrical signal from the AV node to the AV bundle.
Correct Answer: A
Rationale: The delay allows atrial contraction to finish, ensuring blood is fully transferred to the ventricles.
Question 2 of 5
Which of the following would cause blood pressure to decrease?
Correct Answer: D
Rationale: Atrial natriuretic factor (ANF) promotes vasodilation and sodium excretion, reducing blood volume and thus lowering blood pressure. The other options increase blood pressure.
Question 3 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 4 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 5 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.