ATI LPN
Questions About the Cardiovascular System Questions
Question 1 of 5
Depolarization of the ventricles is:
Correct Answer: A
Rationale: The QRS complex (often referred to as RS in simplified terms) on an ECG represents the depolarization of the ventricles, which initiates ventricular contraction.
Question 2 of 5
Jodie Swallow is a top class female British Triathlete, and has a resting heart rate of 36 bpm. Give reasons why such an athlete might have a low resting heart rate.
Correct Answer: D
Rationale: Bradycardia in athletes results from increased stroke volume and cardiac efficiency, reducing the need for a high resting heart rate.
Question 3 of 5
Which of the following will grow faster than the other regions?
Correct Answer: B
Rationale: During embryonic development, the bulbus cordis and common ventricle grow rapidly to form the ventricles.
Question 4 of 5
Circus movement in the ventricle can lead to ventricular fibrillation. Which of the following condition in the ventricular muscle will increase the tendency for circus movements?
Correct Answer: A
Rationale: A decreased refractory period allows re-entry circuits, increasing the risk of ventricular fibrillation.
Question 5 of 5
In the figure above, when does the 2nd heart sound occur?
Correct Answer: A
Rationale: The 2nd heart sound (S2) occurs at the end of systole (point D) with the closure of aortic and pulmonary valves.