Water Balance

Question 1

WATER BALANCE
ADH? function?
Produced in? Stored/released in?

ADH released?
ADH not released?

Answer 1

Antidiuretic hormone, regulates osmotic pressure of body fluids by causing kidneys to increase water reabsorption

Hypothalamus, pituitary gland

Concentrated urine, water being reabsorbed by blood stream

Dilute urine, water stays in nephron

Question 2

WATER BALANCE
ADH low body water? Increase blood solutes, means increase osmotic pressure
ADH high body water? Decrease bloods osmotic pressure

Answer 2

Water into blood stream, hypothalamic osmoreceptors shrink, signal pituitary gland release ADH

Water moves into body cells, osmoreceptors swell and deactivate, less ADH

Question 3

WATER BALANCE
ADH and the nephron?
With ADH?
Without ADH?

Answer 3

85% of water in primary filtrate is reabsorbed from proximal convoluted tubule

Collecting duct/distal convoluted tubule become more permeable to water

Remaining 15% not reabsorbed and released in urine

Question 4

WATER BALANCE 
Adults lose water per day?
1% decrease?
5% decrease?
10% decrease?

Answer 4

2L

Thirsty

Pain/collapse

Death