the integrated CV system (BP regulation)

Question 1

what is pressure diuresis?

Answer 1

renal output of water

Question 2

what is pressure natriuresis?

Answer 2

renal output of salt

Question 3

what does excess salt intake result in?

Answer 3

increase H2O retention - increase MAP

Question 4

which is faster - the intake of salt or intake of water?

Answer 4

intake of sodium

Question 5

what effect does renin have in the body?

Answer 5

it acts as an enzyme that helps raise arterial pressure

Question 6

what does renin trigger the release of?

Answer 6

renin - renin substrate - angiotensin I - angiotensin II (powerful vasoconstrictor) =retention of fluids, vasoconstriction

Question 7

what is the direct/indirect effect of angiotensin?

Answer 7

Direct effect - is to retain salt and water. Indirect effect - causes adrenal glands to secrete aldosterone which increases salt/water reabsorption by kidneys

Question 8

what is labeled the “silent killer”

Answer 8

primary hypertension

Question 9

what are rapid responses to control arterial pressure?

Answer 9

baroreceptor feedback, CNS ischemic response, chemoreceptor reflex

Question 10

what are semi-rapid responses to control arterial pressure?

Answer 10

renin-angiotensin vasoconstrictor mechanism, fluid shift through capillary walls

Question 11

what are long term responses to control arterial pressure?

Answer 11

renin-body fluid system, possible involvement of aldosterone