The Cardiac Cycle Flashcards

1
Q

Transition from rest to exercise:

A

Diastole is shortened during exercise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Diastole

A

Relaxation Period> Filling; ⅔ of the time at rest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Systole

A

Contraction Phase> Ejection; ⅓ of the time at rest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Phase 1

A

Ventricular Filling, AV valves open; Occurs during mid to late diastole; Atrial contraction pushes additional blood through

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Phase 2

A

Systole has two periods

Isovolumetric Contraction, AV Valves and Semilunar Valves Closed; Ventricular Ejection: Semilunar Valves Open

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Phases 3

A

Isovolumetric Relaxation

Both AV Valves and Semilunar Valves Closed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What causes a heart attack?

A

Coronary Artery is blocked and myocardial walls are damaged; Causes inadequate oxygen and nutrients delivery and built up acidity by proton generation in myocardial wall; Cannot create electrical impulses for coordinated contraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What protects against heart attack?

A

Exercise training; Increases number of antioxidant enzymes that are available in the heart tissue and heat shock proteins; regularly trains the heart to tolerate reperfusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly