When blood water potential increases, ADH secretion decreases, reducing water reabsorption in the kidneys to produce dilute urine and lower blood water potential.
- osmoreceptors in hypothalamus detect increase in blood water potential - posterior pituitary gland secretes less ADH - decrease in number of aquaporins in cells in distal convoluted tubule and collecting duct - permeability of cells to water decreases - less water reabsorbed by osmosis - larger volume of more dilute urine produced - more water loss so decrease in blood water potential
| Front | What happens when blood water potential increases? |
|---|---|
| Back | - osmoreceptors in hypothalamus detect increase in blood water potential - posterior pituitary gland secretes less ADH - decrease in number of aquaporins in cells in distal convoluted tubule and collecting duct - permeability of cells to water decreases - less water reabsorbed by osmosis - larger volume of more dilute urine produced - more water loss so decrease in blood water potential |
Tags: homeostasis
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