The Kidney

[Maxine450]

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So I just need some help figuring out this part of a BR sheet.

Do these increase or decrease?

Blood loss --> Arterial Pressure ( ) --> Glomerular filtration rate ( )--> Renin release ( )--> Angiotensin II ( ) --> ADH ( ) ---> H20 retention ( ) or Aldosterone ( )-->NaCl retention ( )---> H20 reabsorption ( )

Angiotensin II ( )--> Thirst ( ) ---> H20 intake ( )

The angiotensin II continues from above. I just want to make sure I'm right. Could someone tell me which of these increase or decrease? thanks

 

[wish2bMD]

Blood loss leads to a decrease in arterial pressure-->decrease glomerular filtration rate->increase renin release->increaase angiotensin II->increase ADH->increase h20 retention and aldosterone->increase NaCl retention->increase H2O reabsorption

your body is working to increase blood pressure back to normal which it can do by increasing blood volume through ADH and aldosterone.

I believe my answers are correct, but if something is wrong I hope someone chimes in.

 

[tendiw]

Angiotensin II increases aldosterone not ADH. When BP goes down, the hypothalamus through its hormone releasing factors triggers ADH release from the posterior pituitary.

Otherwise that's all

 

[gabdolce]

It's a very important distinction that tendiw made.

Aldosterone --> regulated by the kidneys (Juxtoglomerular apparatus to be more precise)
Vasopressin --> regulated by the neurohypophysis (posterior pituitary)

That's a very simplified version but you get the idea.