mark wrote:
Quote:
231) ANTIDIURETIC HORMONE
a) is responsible for 60% of all water reabsorption by the renal tubules
b) directly alters GFR
c) is a polypeptide
d) can act on smooth muscle
e) is released from the anterior pituitary gland
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f f t t t
ADH increases permeability of the collecting duct to water which results in an increase in plasma volume and a decrease in urine volume. ADH is a neuropeptide secreted from the posterior lobe of the pituitary, it has a direct effect on vascular smooth muscle resulting in vasoconstriction.
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