short term control of blood pressure

Question 1

what is the driving force that pushes blood through circulation?

Answer 1

MAP- mean arterial pressure

Question 2

what happens if MAP is too low

Answer 2

fainting

Question 3

what happens if MAP is too high

Answer 3

hypertension

Question 4

what is the The arterial baroreflex

Answer 4

one of the body’s homeostatic mechanisms that helps to maintain blood pressure at nearly constant levels

Question 5

what are the other inputs to the medullary cardiovascular centres?

Answer 5

Cardiopulmonary baroreceptors
Central chemoreceptors
Chemoreceptors in muscle 
Joint receptors
Higher centres

Question 6

what are the hormones that regulate blood pressure in the long term?

Answer 6

Renin - Angiotensin - Aldosterone system

Vasopressin

Atrial natriuretic peptide & Brain natriuretic peptide

Question 7

whats the effect of Renin - Angiotensin - Aldosterone system on regulating blood pressure in the long term?

Answer 7

angiotensin II causes arteriolar constriction, and  increase  TPR
aldosterone increase Na+ reabsorbtion, and  increase  plasma volume

Question 8

whats the effect of Vasopressin system on regulating blood pressure in the long term?

Answer 8

causes arteriolar constriction, and increase  TPR

increases water permeability of collecting duct, and   increase plasma volume

Question 9

whats the effect of Atrial natriuretic peptide & Brain natriuretic peptide on blood pressure, long term?

Answer 9

causes arteriolar dilation,  and decrease  TPR

increase Na+ excretion (natriuresis), and decrease  blood volume

Question 10

what is the Valsalva manoeuvre

Answer 10

forced expiration against a closed glottis

Question 11

where is incease of thoracic pressure

Answer 11

aorta