Question

i am stored in the posterior pituitary gland but i am produced somewhere else. i am secreted when your body is getting low on water, and i act on the kidneys to prevent excessive water loss. What am i ?

Answer 1

ADH Anti-diuretic hormone

Step-by-step explanation:

When blood water potential is low, Osmoreceptors detect change and ADH is stimulated in the hypothalamus which causes an increase in ADH in the bloods water potential. This then increases the distal convoluted tubule and collecting ducts permeability to water resulting in more water being reabsorbed back into the blood resulting in an increase in blood water potential.

When blood water potential is high, Osmoreceptors detect change and stimulation to ADH is reduced in the hypothalamus which causes a decrease in ADH in the bloods water potential. This then decreases the distal convoluted tubule and collecting ducts permeability to water resulting in less water being reabsorbed back into the blood resulting in a decrease in blood water potential.