Control of cardiac output

Question 1

Afterload

Answer 1

The load the heart must eject blood against roughly equivalent aortic pressure

Question 2

Preload

Answer 2

Amount the ventricles are stretched in diastole related to end diastolic pressure or central venous pressure

Question 3

Total peripheral resistance

Answer 3

Sometimes referred to as systematic vascular resistance resistance to blood flow offered by all the systematic vasculature

Question 4

What happens if the total peripheral resistance falls and cardiac output is unchanged?

Answer 4

Arterial pressure will fall and venous pressure will increase

Question 5

What happens if total peripheral resistance increases and cardiac output is unchanged?

Answer 5

Arterial pressure will increase and venous pressure will fall

Question 6

What happens if cadiac output increases and total peripheral resistance is unchanged?

Answer 6

Arterial pressure will increase and venous pressure will fall

Question 7

What happens if cardiac output decreases and total perpherial reisistance is unchanged?

Answer 7

Arterial pressure will fall and venous pressure will rise

Question 8

Stroke volume equation

Answer 8

Stroke volume= end diastolic volume- end systolic volume

Question 9

Frank starling law of the heart

Answer 9

If you stretch the fibres of the heart before contracting it will contract harder , the more that the heart fill, the harder that it contracts up to a point.

Question 10

The starling curve

Answer 10

The normal point is 8 mmHg and the stroke volume is 70 ml