Cardiac

Question 1

What happens in the first phase of the cardiac cycle?

Answer 1

The heart at rest: atrial and ventricular diastole
The atria are filling with blood from the vein
AV valves open —>ventricles fill
Passive filling

Question 2

Passive filling occurs during

Answer 2

atrial diastole, ventricular diastole(late diastole phase in it)

Question 3

Ventricular distaole- late diastole

Answer 3

both sets of chambers are relaxed and ventricle fill passively

Question 4

atrial systole

Answer 4

The second phase of the cardiac cycle-
atrial contraction forces a small amount of additional blood into the ventricles (last 20%)

Question 5

Isovolumetric contraction

Answer 5

1st phase of ventricular contractionpushes AV valves closed but does not create enough pressure to open semilunar valves. Maximum blood volume in vetricles= EDV

Question 6

as ventriculer pressure rises and excees pressure in the arteries, the semilunar valves open and blood is ejcted

Answer 6

Ventriular ejection

Question 7

Isovolumic ventricular relaxation

Answer 7

as ventricles relax, pressure falls,. Blood flows back into cusps of semilunar valaves and snaps them closed. Minimum blood volume in ventricles = end systolic volume