cardiac cycle- lqc 1b

Question 1

define the cardiac cycle

Answer 1

The sequence of events from one heartbeat to the next heartbeat, involving relaxation (heart fills with blood) and contraction (heart empties), with 3 phases, atrial systole, ventricular systole and diastole.

Question 2

in diastole which Part of the heart involved and whether it contracts or relaxes?

Answer 2

atria and ventricles and they relax

Question 3

in diastole which valves are closed

Answer 3

semilunar valves

Question 4

in diastole which valves are open

Answer 4

atrioventricular valves

Question 5

in diastole where is the movement of blood

Answer 5

blood enters the atria and passively flows into ventricles

Question 6

in atrial systole which part of the heart is involved and does it contract or relax

Answer 6

atria and contracts

Question 7

which valves are open in atrial systole

Answer 7

atrioventricular valves

Question 8

in atrial systole what is the movement of blood

Answer 8

from atria to ventricles

Question 9

in ventricular systole which part of the heart is involved and does it relax or contract

Answer 9

ventricles and contract

Question 10

which valves are closed in ventricular systole

Answer 10

atrioventricular valves

Question 11

which valves are open in ventricular systole

Answer 11

semilunar valves

Question 12

what is the movement of the blood in ventricular systole

Answer 12

from ventricles to pulmonary artery and aorta

Question 13

explain why the atrioventricular valves need to close

Answer 13

ventricle needs to contract and force blood into the aorta so valves need to close to prevent back flow into the atria on contraction