Quick practice
Question 1 of 5
Which of the following is correct w.r.t. the second heart sound during a cardiac cycle?
A
(1) It is associated with the closure of semilunar valves at the beginnings of ventricular systole.
B
(4) It is associated with the closure of semilunar valves at the beginning of ventricular diastole.
C
(2) It is produced after an interval of 0.8 seconds from the first heart sound.
D
(3) It is lower pitched and cannot be easily heard through a stethoscope
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