ATI LPN
Cardiovascular System Questions Questions
Question 1 of 5
Why is atherosclerosis especially dangerous when found in coronary arteries?
Correct Answer: D
Rationale: Atherosclerosis is a disease of the arteries characterised by the deposition of fatty material on their inner walls that can lead to a heart attack, restrict blood flow to the heart muscle, and lead to coronary heart disease.
Question 2 of 5
When recording lead aVL on ECG, the positive electrode is the:
Correct Answer: A
Rationale: Lead aVL uses the left arm as the positive electrode, with the right arm and left leg as reference.
Question 3 of 5
Which of the following events occurs at the end of the period of ventricular ejection?
Correct Answer: D
Rationale: The end of ventricular ejection is marked by the closing of the semilunar valves (aortic and pulmonary).
Question 4 of 5
An increase in contractility is determined on a Frank-Starling diagram by:
Correct Answer: B
Rationale: Increased contractility raises cardiac output for the same end-diastolic volume on a Frank-Starling curve.
Question 5 of 5
The free radical nitric oxide is generated in cells by reaction catalyzed by:
Correct Answer: B
Rationale: Nitric oxide synthase (NOS) catalyzes the production of nitric oxide.