1.1.5 - Cardiac Cycle Flashcards

1
Q

What Is The Cardiac Cycle?

A

A series of events that take place in one heart beat, including muscle contraction and relaxation.

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

During Contraction Of The Heart, What Occurs?

A

Systole.

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

During Relaxation Of The Heart, What Occurs?

A

Diastole.

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

What Does Contraction Of The Heart Muscle Cause?

A

A decrease in volume in the corresponding chamber of the heart, which then increases again when the muscle relaxes.

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

When The Volume Of Blood Decreases, What The Happens To The Pressure?

A

Pressure increases.

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

When The Volume Of Blood Increases, What Then Happens To The Pressure?

A

Pressure decreases.

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

What Happens During Ventricular Diastole & Atrial Systole?
(4 Points)

A

~ Ventricles are relaxed, atria contract.

~ Decreasing volume and increasing pressure inside the
atria.

~ Pushing blood into the ventricles due to pressure in the atria rises above that in the ventricles, forcing the AV valves open.

~ There is a slight increase in ventricular pressure and volume as the ventricles receive the blood from the contracting atria.

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

What Happens During Ventricular Systole & Atrial Diastole?
(4 Points)

A

~ Atria relax, ventricles contract

~ Increasing pressure, decreasing volume inside the ventricles.

~ AV valves close, due to higher pressure in ventricles than the atria.

~ The pressure in the ventricles is higher than the aorta and the pulmonary artery, forcing the SL valves open to force blood into the arteries.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What Happens During Cardiac Diastole?
(5 Points)

A

~ Ventricles and atria are both relaxed.

~ The higher pressure in the pulmonary artery and aorta closes the SL valves, preventing back flow into the ventricles.

~ The atria continue to fill with blood

~ Blood returns to the heart via the vena cava and pulmonary vein.

~ Atrial systole and ventricular diastole begins.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

During The Diastole Stage In The Cardiac Cycle, What Happens In Regards To The AV & SV valves?
(2 Points)

A

~ AV is open.

~ SV is closed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

During The Systole Stage In The Cardiac Cycle, What Happens In Regards To The AV & SV valves?
(2 Points)

A

~ AV is closed

~ SV is open.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What Occurs At Point A

A

End of cardiac diastole.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What Occurs Between Points A & B?

A

Atrial systole.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What Occurs At Points B & C?

A

Ventricular systole.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What Occurs At Point D & E?

A

Cardiac diastole.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Calculate The Heart Rate Of This Person. Give Your Answers In BPM
(4 Points)

A

~ 1 cardiac cycle = 0.7 seconds.

~ 1 / 0.7 =1.43 beats in 1s.

~ 1.43 x 60 =85.71 beats in 1m.

~ 85.71 BPM.