draw a flow chart to explain regulation of kidney function by adh or vesopresin
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Antidiuretic hormone (ADH) from the posterior pituitary acts on the kidney to promote water reabsorption, thus preventing its loss in urine. The most important variable in regulating ADH is plasma osmolarity. Reduced volume of extracellular fluid promotes secretion of ADH, but is a less sensitive mechanism.
Function. Vasopressin regulates the tonicity of body fluids. It is released from the posterior pituitary in response to hypertonicity and causes the kidneys to reabsorb solute-free water and return it to the circulation from the tubules of the nephron, thus returning the tonicity of the body fluids toward normal.
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