Anatomy and Physiology: Endocrine System: Antidiurectic Hormone (ADH) V2.0
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Anatomy and Physiology: Endocrine System: Antidiurectic Hormone (ADH) V2.0


Lets learn about antidiuretic hormone or ADH.
Antidiuretic hormone or vasopressin helps to control fluid volume.
ADH is secreted by the posterior portion of the pituitary gland.
The pituitary gland is divided into anterior and posterior portions.
ADH is secreted in response to an increase in blood solute concentration.
Blood solute concentration is sensed by osmoreceptors in the hypothalamus.
ADH is also secreted in response to a decrease in fluid volume.
ADH is a hormone that travels in the blood to the kidneys.
ADH promotes fluid retention by the kidneys. ADH has an effect on the distal convoluted
tubule and collecting duct of the nephron. Lets take a closer look.
ADH makes the distal convoluted tubule more permeable to water.
ADH promotes the appearance of water channels called aquaporins.
Water moves out of the distal convoluted tubule and collecting duct toward the higher solute
concentration in the interstitium. Water moves into the blood increasing blood
volume and decreasing blood solute concentration this works to restore homeostasis. We hope you have learned something about ADH
and see you next time.

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