Blood pressure and haemodynamics

Question 1

How is BP controlled intrinsically?

Answer 1

Dilation
Response injury

Question 2

How is BP controlled extrinsically?

Answer 2

Sympathetic innervation- Vasoconstriction
Hormones
Adrenaline, angio 2, ADH, ANP
Nitric oxide

Question 3

What controls rapid blood pressure?

Answer 3

Baroreceptors

Question 4

Where are baroreceptors located?

Answer 4

Aortic arch
Carotid sinus

Question 5

What occurs when BP increases?

Answer 5

1) Blood pressure increases
2) Increased baroreceptor active
3) Increase number afferent impulses to CV centre
4) Increase PSNS activity, decrease SNS activity
5) Decrease CO and vasodilation
6) Reduce BP

Question 6

What occurs when BP decreases?

Answer 6

1) Blood pressure decreases
2) Decreased baroreceptor activity
3) Decrease number afferent impulses to CV centre
4) Increased SNS activity, decrease PSNS activity
5) Increase CO and vasoconstriction
6) Increase BP

Question 7

What is the reaction involving CO and pressure?

Answer 7

Question 8

What is units for equation of cardiac output?

Answer 8

Q= ml/min
change pressure= mm Hg
Resistance= mm Hg/ml/min

Question 9

Write equation for Mean Arterial Pressure?

Answer 9