the cardiac cycle

Question 1

what is systole

Answer 1

contraction
(occurs separately in atrium and ventricles)

Question 2

what is diastole

Answer 2

relaxation

Question 3

pressure above valves higher than below?

Answer 3

forces valve open

Question 4

pressure below valve higher than above?

Answer 4

forces valve shut

Question 5

cardiac output

Answer 5

volume of blood pumped by heart per minute

Question 6

heart rate

Answer 6

number of beats per minute

Question 7

stroke volume

Answer 7

volume blood pumped during 1 heart beat

Question 8

equation

Answer 8

cardiac output= heart rate x stroke volume

Question 9

what happens during diastole

Answer 9

1. atria and ventricles relax
2. atria fill
3. pressure increases
4. atrioventricular valves open (higher
   pressure in atrium than ventricles)
5. blood flows into ventricles

Question 10

what happens during atrial systole

Answer 10

1. atria contract forcing more blood into
   ventricles
2. pressure increases

Question 11

what happens during ventricular systole

Answer 11

1. ventricles begin to contract
2. atrioventricular valves shut
3. semilunar valves forced open
4. blood forced out of heart into arteries
5. semi lunar valves shut (pressure in the aorta and pulmonary artery higher than ventricles)