Soon after the onset of ventricular systole, the a. AV valves close. b. semilunar valves open. c. first heart sound is heard. d. aortic pressure increases. To count the heart rate for an apical pulse,...

Soon after the onset of ventricular systole, the

a. AV valves close.

b. semilunar valves open.

c. first heart sound is heard.

d. aortic pressure increases.

To count the heart rate for an apical pulse, you would place your stethoscope approximately at the level of the

a. third intercostal space.

b. fourth intercostal space.

c. fifth intercostal space.

d. sixth intercostal space.