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A 19-year-old male asked:

If the posterior pituitary only stores the adh (vasopressin) the hypothalamus makes, how come adh (vasopressin) doesn't go into the bloodstream when the hypothalamus is in tact?

1 doctor answer3 doctors weighed in
Dr. Dariush Saghafi
Neurology 35 years experience
Released by need: I'm not sure I understand what you mean. ADH (vasopressin) in fact, is secreted or released into the bloodstream from the post. pituitary. It is released according to demand and not before. So if you're asking why doesn't it "pour" out into the bloodstream then, that's the reason. There is a gating effect whereby NEED of the body (having to do mainly with sodium concentrations) signals the gate to open&close
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Dr. Dariush Saghafi
Neurology 35 years experience
Provided original answer
Why isn't the posterior hypothalmus intact?
Jul 12, 2014

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Last updated Jul 14, 2014

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