ATI LPN
Cardiovascular System Questions Questions
Question 1 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 2 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.
Question 3 of 5
Identify the vessel that transports oxygen rich blood to the fetus.
Correct Answer: D
Rationale: The umbilical vein carries oxygenated blood from the placenta to the fetus.
Question 4 of 5
Which of the following type of muscle contains the largest number of mitochondria per cell?
Correct Answer: C
Rationale: Cardiac muscle cells have the highest mitochondrial density among muscle types, reflecting their high energy demands and constant activity.
Question 5 of 5
A corrective cardiac procedure in which a large piece of a patient's own latissimus dorsi muscle is wrapped around the heart and stimulated by an implanted pacemaker to assist the pumping action of a damaged heart.
Correct Answer: D
Rationale: Cardiomyoplasty is the described procedure; the others are conditions, not surgical interventions.