Unit 1.Lec 7-The Cardiac Cycle Flashcards
1
Q
In phase b of the cardiac cycle are valves open or closed? What happens to pressure?
A
- Valves are closed
- Pressure develops during myocardial contraction
2
Q
What causes heart valves to open?
A
When the ventricular chamber pressure exceeds the aortic blood pressure
3
Q
- Pressure Upstream > Pressure Downstream: Valves_______
- Pressure Upstream < Pressure Downstream: Valves ________
A
- Open
- Closes
4
Q
Blood moves according to what?
A
Pressure gradient
5
Q
What parts of the heart does pressure change occur?
A
- Left Atrium
- Left Ventricle
- Left Aorta
6
Q
What part of the heart does volume change occur?
A
- Left Ventricle
7
Q
What parts of the heart does electrical changes occur?
A
- Left Atria
- Left Ventricle
8
Q
List the valves that open & close
A
- Aortic valve (and pulmonary)
- A-V valves (tricupsid/mitral)
