ATI LPN
Cardiovascular Disease Questions Questions
Question 1 of 5
What causes the semilunar valves to open?
Correct Answer: B
Rationale: The semilunar valves open when the pressure in the ventricles exceeds the pressure in the pulmonary trunk and aorta, forcing the valves to open and eject blood into these vessels.
Question 2 of 5
Identify the vessels that branch off the ascending aorta.
Correct Answer: D
Rationale: The ascending aorta branches into the left and right coronary arteries, supplying the heart.
Question 3 of 5
Identify the muscular ridges that are found on the anterior wall of the right atrium and extend into the auricles.
Correct Answer: A
Rationale: Pectinate muscles are ridges in the right atrium and auricles.
Question 4 of 5
Which wave in an electrocardiogram represents repolarization of the ventricles?
Correct Answer: B
Rationale: The T wave on an ECG represents ventricular repolarization, preparing the ventricles for the next cycle of depolarization and contraction.
Question 5 of 5
Precapillary sphincters are located in venules.
Correct Answer: B
Rationale: Precapillary sphincters are in arterioles, regulating blood entry into capillaries, not venules.