Chapter 20 3-D Physiology - The Cardiac Cycle

The first sound heard in a stethoscope during the cardiac cycle is the contraction of the ventricles contraction of the atria closing of the semilunar valves closing of the AV valves

closing of the AV valves

Atrial systole is necessary to allow blood to passively fill the chambers fill the aortas with blood fill the ventricles with blood close the AV valves

fill the ventricles with blood

The right side of the heart is concerned with pumping oxygenated blood two of the choices are correct systemic circulation pulmonary circulation

pulmonary circulation

Semilunar valves close during ventricular diastole to prevent blood from flowing from the arteries into the ventricles. True/False

true

When all heart valves are closed during isovolumetric ventricular contraction, the amount of blood (volume) is constant but blood pressure increases. True/False

true

Semilunar valves function to prevent blood from flowing back into the atria during atrial diastole ventricles during ventricular systole ventricles during ventricular diastole atria during atrial systole

ventricles during ventricular diastole

Blood leaves the heart during ventricular ejection ventricular relaxation isovolumetric ventricular relaxation passive ventricular filling

ventricular ejection

If a a typical adult male has a heart rate of 70 beats per minutes, how much blood would flow through the heart each minute? 70 mL 700 mL 4,900 mL 5,250 mL

4,900 mL

Ventricular muscle is relaxed during ventricular diastole approximately half of the cardiac cycle during atrial systole all of the above

all of the above

Towards the end of ventricular systole when ventricular blood pressure exceeds aortic blood pressure semilunar valves open AV valves open AV valves close semilunar valves close

semilunar valves open