What happens if there is too much water in the blood
- Osmoreceptors in the hypothalamus will detect the high water potential
- causing more water in cells causing to swell
- Less ADH is secreted by the pituartiy gland
- The DCT and collecting duct are less permeablle to water
- Less water is reabsorbed into the bloodstream
- Decrease concentration of urine
- Increase volume of urine
What happens if there is too little water in the blood?
- Osmoreceptors in the hypothalamus detect the lower water potential in blood
- Moves water leaves cells - shrink
- More ADH is secrected by the pituarity gland
- The DCT and collectign duct are more permeabel to water
- More water is reabsorbed
- Decrease volume of urine
- Increase concentration of urine
What happens when there is more ADH?
- ADH travels by blood plasma
- More ADH will bind to the complemenatry receptors on DCT
- This will trigger more enzyme-controlled reactions
- Inside DCT has vesicles with auqporins
- More vesicles fuse and place aquaporins at bottom of DCT
- More water will move bt aquaporins inot blood stream by osmosis
- From cell into blood stream - lumen of collecting duct
What happens if there is less ADH?
- Less ADH will bind to the complemenatry receptors on DCT )low con in blood)
- This will trigger fewer enzyme-controlled reactions
- Causes less vesicles with less aquaporins attached fuse at bottom of DCT
- Less water move out of aquaporins
- Less water asborbed into blood stream by osmosis
What does ADH stand for?
Made in hypothalamus
Stored in posterior pituartiy gland