Lesson #7

Question 1

Once complete cardiac cycle:

Answer 1

1. Cardiac filling.
2. Muscle excitation.
3. Ejection of blood from ventricles.
4. Cardiac relaxation.

Question 2

Following the ejection phase, as blood moves away from the heart, what will occur?

Answer 2

Aortic pressure will decrease.

Question 3

True or false: During the majority of diastole, ventricular filling is active.

Answer 3

FALSE- ventricular filling in primary a passive process.

Question 4

Isovolumetic contraction occurs until?

Answer 4

The aortic valve opens.

Question 5

Isovolumetric relaxation begins when:

Answer 5

The aortic valve closes.

Question 6

What happens to ventricular myocytes during ejection?

Answer 6

They shorten.

Question 7

Define ejection fraction:

Answer 7

The volume of blood ejected from the ventricles, in relation to its starting volume.

Question 8

Define stroke volume:

Answer 8

1.stroke volume is the amount of blood pumped out of the left ventricle.
2. SV = EDV - ESV.