AP BIOLOGY

Detailed explanation-1: -Secretion of anti-diuretic hormone also occurs if the concentration of salts in the bloodstream increases, for example as a result of not drinking enough water on a hot day. This is detected by special nerve cells in the hypothalamus (osmoreceptors) which simulate anti-diuretic hormone release from the pituitary. .

Detailed explanation-2: -ADH is stored in neurons within the hypothalamus. These neurons express osmoreceptors that are exquisitely responsive to blood osmolarity and respond to changes as little as two mOsm/L. [2] Therefore, slight elevations in osmolarity result in the secretion of ADH.

Detailed explanation-3: -Sensors in your body detect when your blood volume changes and needs more ADH. These sensors talk to your brain and the pituitary gland releases ADH into your bloodstream. When ADH makes it to your kidneys, it signals them to conserve water and produce more concentrated urine.

Detailed explanation-4: -If the water potential of the surrounding extracellular fluid falls (osmolarity or tonicity rises) as a result of water being lost, this is detected by osmoreceptors in the hypothalamus. This then causes the release of ADH into the blood circulation and it passes to the kidneys (as well as the rest of the body).

Detailed explanation-5: -A low level results in greater urine production. Normally, the amount of ADH in the body is higher during the night. This helps prevent urination while you are sleeping. But if the levels of ADH remain low during the night, the body will produce large amounts of urine, so urination during the night is more likely.