The first heart sound (S1) is created primarily by:

A. closure of the semilunar valves
B. closure of the atrioventricular valves
C. opening of the semilunar valves
D. opening of the atrioventricular valves

Answer: B. closure of the atrioventricular valves

Health Professions

You might also like to view...

All of the following are questions to ask when reviewing a study, EXCEPT:

A) Was the study type appropriate? B) Was the research peer reviewed? C) Were the results reported properly? D) What control group were the researchers studying?

Health Professions

Which of the following techniques for loss control allows water to run off without collecting in the depressions?

A. By lifting and removing the floor covering B. By using one salvage cover for the entire room C. By creating one high point in the furniture group D. By putting pictures, curtains, and lamps on the bed

Health Professions