With which of the following is "lubb-dupp" associated?
A)Myocardial contraction
B)Ventricular depolarization
C)Closing of heart valves
D)Diffusion of O₂ from the lungs to the blood in the pulmonary capillaries

Question

Quizplus · Accepted Answer

"Lubb-dupp" refers to the sound made by the closing of the heart valves during the cardiac cycle. The first sound "lubb" is caused by the closure of the atrioventricular valves (mitral and tricuspid), and the second sound "dupp" is caused by the closure of the semilunar valves (aortic and pulmonic).

With Which of the Following Is "Lubb-Dupp" Associated