ATI LPN
Cardiovascular System Questions Questions
Question 1 of 5
Regarding the conduction system of the heart:
Correct Answer: B
Rationale: The AV node contains P cells, which are responsible for pacemaker activity.
Question 2 of 5
The heart secretes the hormone that regulates
Correct Answer: D
Rationale: The heart secretes atrial natriuretic hormone (ANH) to regulate blood pressure by promoting sodium and water excretion.
Question 3 of 5
What is the natural pacemaker of the heart?
Correct Answer: B
Rationale: The SA node is the natural pacemaker, initiating the heartbeat.
Question 4 of 5
Identify the type of vessel that functions in exchange of blood gases, nutrients, and wastes.
Correct Answer: D
Rationale: Capillaries are specialized for the exchange of gases, nutrients, and waste products between blood and tissues due to their thin walls and slow blood flow.
Question 5 of 5
In response to a decrease in blood pressure, heart rate will_____ and the arterioles will______.
Correct Answer: D
Rationale: In response to decreased blood pressure, the cardiovascular system increases heart rate and constricts arterioles to raise blood pressure.