Blood Pressure

Question 1

What are the barcoreceptors

Answer 1

Stretch receptors
Detect blood pressure

Question 2

What would happen when the baroreceptors detect the increased blood pressure

Answer 2

They increase firing and would then allow the sympathetic stimulation to decrease

Question 3

What innovates the SA and the AV. Node

Answer 3

The sympathetic and the parasympathetic systems

Question 4

Where would the baroreceptors be

Answer 4

The aortic arch
The carotid sinus

Question 5

What receptors does noradrenaline bind to for the increased heart rate and contraction.

Answer 5

The beta 1

Question 6

What receptor does the noradrenaline bind to for the vasoconstriction

Answer 6

The alpha 1

Question 7

What centre would control the vasoconstriction

Answer 7

The cardiac vasomotor centre

Question 8

What would the adrenal medulla be innovated by

Answer 8

The sympathetic chain ganglia
Chromaffin cells would then release the adrenaline (80%) and the noradrenaline (20%)

Question 9

What are the afferent fibres of the aortic arch barcoreceptors

Answer 9

The CN 10

Question 10

What are the afferent fibres of the carotid sinus barcoreceptors

Answer 10

The CN 9

Question 11

What are the parts of the vasomotor centre

Answer 11

C1 - vasoconstriction
A1 - vasodilation

Question 12

Where do the CN 9 AND 10 get there information from

Answer 12

The nucleus of tractus solitarius

Question 13

What is the nerve innovation for vasoconstriction

Answer 13

T1 to L2

Question 14

What is the nerve innovation for the controls of the heart

Answer 14

Sympathetic form t1 to t5

Question 15

What would stimulate the JG

Answer 15

Binding if the noradrenaline to the B1 receptors

Question 16

Where would angiotensinogen be made

Answer 16

The liver (cleaved by renin)

Question 17

Where would ACE be made

Answer 17

The lungs

Question 18

What are the roles on ang 2

Answer 18

Vasoconstriction (increased systemic resistance)
Stimulates the hypothalamus thirst centre
Release of aldosterone from the Zona glomerulas
Release of ADH from the supraoptic region of the hypothalamus

Question 19

How would the aqauporins be made

Answer 19

The ADH would bind to the V2 receptors in the collecting duct, this would then stimulate the aqauporins to be made
This would then allow the increased water uptake

Question 20

Where would the aldosterone act

Answer 20

In the distal convoluted tubule

Question 21

How would you Maintain hypotension in the short term

Answer 21

Reverse the sympathetic activity
Decreased ca2+
Open the k+ channels so the cell would hyperpolarise

Question 22

How would hypertension be regulated in the long run

Answer 22

Increased atrial pressure, atria produce the atrial natriurtic peptide

Question 23

What is the function of the atrial natriurtic peptide

Answer 23

Vasodilator - increased venous compliance - decreased venous pressure - reduced ventricle preload -lower cardiac output

Counteracts the RAAS system