Blood Pressure

Question 1

Flow of blood

Answer 1

L-Ventricle-Large arteries -Arterioles- capillaries venues- veins

Question 2

Mean arteriole pressure

Answer 2

Blood volume
Cardiac output
Blood flow distribution
Resistance

Question 3

Baroreceptors

Answer 3

Mechxnosensitive receptors
Respond rapidly
Relay to the CV region of the medulla oblongata
Short term changes

Question 4

A-fibres

Answer 4

Large diameter 
Myelinated 
Low pressure threshold 
Fast conducting 
C-Fibres =opposite

Question 5

Moving from supine to upright

Answer 5

Decreased Venous return
Decreased stroke volume
Decreased cardiac output

Decreased blood pressure

Question 6

RAAS

Answer 6

Renin angiotensin aldosterone system 
ANGIOTENSINOGEN 
ANGIOTENSIN I
ANGIOTENSIN II —-> Stimulation of thirst 
ALDOSTERONE —-> Na+ reabsorption

Question 7

Mild Haemorrhage

Immediate

Answer 7

Blood loss = decrease in BP
Baroreceptors= increase sympathetic discharge
Release of endogenous vasoconstrictors (adrenaline and ADH)

Question 8

Mild haemorrhage

Regulation of blood

Answer 8

Diverted from skin liver and kidney etc

Increased to cerebral ad coronary regions

Question 9

Mild haemorrhage

Medium term

Answer 9

Recovery of blood plasma
Fluid exchange from ICF to ECF
Renal conservation of water
Increased thirst sensation

Question 10

Severe haemorrhage

Answer 10

Cardiac depression
-BP too low to maintain coronary blood flow
-Deterioration of cardiac contraction and decreased cardiac output
CNS depression
Diminished blood flow to brain depresses vasomotor discharge