Place the events in order--PLEASE HELP!? A. Semilunar vavles close B. Av- vavles close C. QRS Complex D. Semi?

Question

Place the events in order--PLEASE HELP!?
A. Semilunar vavles close
B. Av- vavles close
C. QRS Complex
D. Semi lunar vavles open
E. Ventricular deplorization

Answer 1

Whoever gave you this question has written it very badly.



C and E are the same event. The QRS represents ventricular depolarisation. So these two events are simultaneous.



As for the rest of the question it really depends on where you want to start in the cardiac cycle....there is no defined beginning or end to the cardiac cycle in medical terms. Think of it like a circle.



If you wanted to start with the QRS then the events would be as follows:

C and E together

D - semilunar valves open at the beginning of ventricular systole

A - semilunar velves close at end systole

B - AV vales close at end diastole

then c and e together once more