The Cardiac Cycle (not finished)

Question 1

What is the cardiac cycle?

Answer 1

1. Late diastole - both sets of chambers are relaxed and the ventricles fill passively
2. Atrial systole - atrial contraction forces a small amount of additional blood into the ventricles
3. Isovolumic ventricular contraction - first phase of ventricular contraction pushes AV valves closed but does not create enough pressure to open the semilunar valves
4. Ventricular contraction - As ventricular pressure rises and exceeds pressure in the arteries, the semilunar valves open and blood is ejected
5. Isovolumic ventricular relaxation - as ventricles relax, pressure in ventricles falls, and blood flows back into cusps of semilunar valves and snaps them closed

Question 2

What is ejection called?

Answer 2

Systole

Question 3

What is filling called?

Answer 3

Diastole

Question 4

How long is each cardiac cycle?

Answer 4

0.8 s

Question 5

How much of the cycle does systole make up?

Answer 5

1 / 3

Question 6

How much of the cycle does diastole make up?

Answer 6

2 / 3

Question 7

As the heart rate increases, what takes up more of the cycle?

Answer 7

Systole

Question 8

Which valve is passive?

Answer 8

Aortic

Question 9

What is the dicrotic notch on a pressure graph?

Answer 9

Ventricle bumps out the blood then relaxes, and then in doing so releases elastic energy and pushes aortic valve shut so the pressure is slightly rebounded

Question 10

What is the pulse pressure?

Answer 10

Difference in the peak (systolic) pressure and the minimum (diastolic) pressure

Question 11

What is the MAP?

Answer 11

Diastolic pressure + 1/3 of pulse pressure

Question 12

What does EDV stand for?

Answer 12

End diastolic volume

Question 13

What does ESV stand for?

Answer 13

End systolic volume