BP regulating hormones

Question 1

AT II

Answer 1

Affects baroreceptor function;
Limits reflex bradycardia, which if normally accompany its pressor effect

Thus help maintain blood volume and BP

Question 2

ANP

Answer 2

Released from atria in response to increased volume;
may act as a check on renin-angiotensin-aldo system;
relaxes vascular smooth muscle via cGMAP,
Increases GFR, decreases renin

Question 3

ADH

Answer 3

Primarily regulates osmolarity,
but also responds to low blood volume.
This takes precedence over osmolarity

Question 4

Aldosterone

Answer 4

Primarily regulates blood volume;
in low volume states,
both ADH and aldo act to protect volume