Lecture 10: Fluid Balance Flashcards
1
Q
what does ADH interact with
A
- V2 receptors
- on basolateral surface
- of principal cells
- in collecting duct
2
Q
what do osmoreceptors stimulate
A
- ADH release
- thirst
3
Q
what do baroreceptors stimulate
A
- RAAS
- ADH
- ANP
- SNS
4
Q
where are the baroreceptors
A
- large systemic veins
- cardiac atria
- pulmonary vasculature
arterial stretch receptors on - carotid sinus
- aortic arch
- renal afferent arteriole
5
Q
actions of angiotensin II
A
- Na+ and water reabsorption
- aldosterone release from adrenal cortex
- acts on hypothalamus to stimulate thirst and ADH release
- vasoconstriction
- longer term causes renal hypertrophy so more protein synthesis of Na+ transporters
6
Q
actions of aldosterone
A
- Na+ reabsorption
- K+ excretion
7
Q
actions of ANP
A
- causes natriuresis
- released in response to high atrial stretch
- Na+ excretion
- renal vasodilation
- inhibits RAAS
