Physiology: hormonal control of BP

Question 1

what is RAAS

Answer 1

renin angiotensin aldosterone system

Question 2

what does the RAAS act to do

Answer 2

increase BP

Question 3

what facilitates angiotensinogen to angiotensin 1 reaction

Answer 3

renin

Question 4

what facilitates the reaction from angiotensin 1 to angiotensin 2

Answer 4

ACE

Question 5

what part of the RAAS acts by stimulating and binding other substances to increase BP

Answer 5

angiotensin 2

Question 6

what do the natueritic peptides act to do

Answer 6

decrease BP

Question 7

what are the 2 different types of natueritic peptide

Answer 7

ANP = atrial natueritic peptide
BNP = brain natueritic peptide

Question 8

what is ANP secreted by and when

Answer 8

hormone secreted by atria in response to high BP

Question 9

what is BNP secreted by and when

Answer 9

hormone secreted by ventricles in response to stretching caused by increased ventricular volume

Question 10

what effect does ANP have

Answer 10

causes decrease in extracellular fluid(ECF) volume by increasing renal Na excretion
(antagonises actions of angiotensin 2 and aldosterone)

Question 11

what effect does BNP have

Answer 11

causes decrease in SVR/TPR and CO