RAAS

Question 1

Qu’est le RAAS system

Answer 1

Renin-angiotensine-aldosterone-system.
1: Blood pressure drops causes
2: Kidneys to respond and release renin which causes the liver to respond
3: Liver reponds and activates angiotensinogene which turns into angiotensine 1
4: ACE - Angiotensin converting enzyme turns angiotensin 1 into angiotension 2.
5: Angiotensin 2 causes:
Major vasoconstriction (Less blood flow to kidneys = limit ability to excrete water)
Adrenal cortex to release aldosterone which leads kidneys to keep sodium and water in blood while decreasing urination.
Release of ADH (anti-diuretic hormone) which increases thirst mechanism and leads kidneys to keep water = increase blood volume.

Question 2

Ok so blood pressure drops. What comes next

Answer 2

Kidneys sense this and release renin

Question 3

Ok now the blood pressure dropped and the kidneys responded by releasing renin, what happens next

Answer 3

The liver responds to the renin and release angiotensinogene which turns into angiotensine 1.

Question 4

Okay so blood pressure dropped. Kidneys released Renin was release which caused the liver to activate angiotensinogene which got converted into angiotensine 1. What now

Answer 4

Angiotensine 1 gets converted into angiotensine 2 by the ACE (angiotensine converting enzyme)

Question 5

Okay so blood pressure dropped. Kidneys release renin which caused the liver to activate angiotensinogene which got converted into angiotensine 1 and then converted into angiotensine 2 by the ACE angiotensine converting enzyme. What happens now

Answer 5

Angiotensine 2 causes
Major vasoconstriction (also decrease of blood to the kidneys which decrease ability to excrete water)
Causes release of aldosterone which 1) leads kidneys to keep sodium and water in blood and 2) decrease urination.
Cause release of ADH (anti-diuretic hormone) which increases thirst mechanism and leads kidneys to keep water (increase blood volume)”