ATI LPN
Cardiovascular Exam Questions Quizlet Questions
Question 1 of 5
When trying to stop arterial bleeding by applying pressure, why is it necessary to apply pressure between the bleeding part and the heart?
Correct Answer: A
Rationale: Arterial bleeding must be stopped by applying pressure between the heart and the injury because blood flows from the heart through arteries to the site, and this interrupts the supply.
Question 2 of 5
Blockade of which of the following will cause ischemia of the infundibulum?
Correct Answer: B
Rationale: The right conus artery supplies the infundibulum (conus arteriosus) of the right ventricle; its blockade causes ischemia there.
Question 3 of 5
In which phase of ventricular muscle action potential is the potassium permeability the highest?
Correct Answer: D
Rationale: Phase 3 (repolarization) has the highest potassium permeability as potassium channels open to restore resting potential.
Question 4 of 5
Activation of the baroreceptor reflex:
Correct Answer: A
Rationale: The baroreceptor reflex primarily regulates blood pressure in the short term by adjusting heart rate and vessel tone.
Question 5 of 5
Which one of the following conditions would you normally expect to find decreased cardiac output?
Correct Answer: D
Rationale: Acute myocardial infarction impairs heart function, reducing cardiac output.