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Anaesthesia Site Editor
Prime Minister Rank
Posts: 1,741
Join Date: Mar 2005
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216) Antidiuretic hormaone -
06-30-2005, 12:57 AM
216) 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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Anaesthesia Site Editor
Prime Minister Rank
Posts: 1,741
Join Date: Mar 2005
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Re:216) Antidiuretic hormaone -
06-30-2005, 12:57 AM
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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Revise Medicine Member
Specialist Regisrar Yr2 Rank
Posts: 48
Join Date: Feb 2006
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08-28-2006, 04:42 PM
ADH and vasopressin are the only two produced from posterior pituitary. ADH is a nonapeptide not a polypeptide. Ref: page 290. Power & Kam
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Revise Medicine Moderator
Consultant Rank
Posts: 112
Join Date: Jul 2005
Location: Rhyl, UK.
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08-28-2006, 06:11 PM
hi jijindr
probably you are correct, polypeptides have been defined in various ways- more consistent definition mentions-a peptide containing 10 to more than 100 amino acids. Vasopressin, being a chain of <10 amino acids is just a peptide, may be oligopeptide.
Thanks for your intrest in website.
GOOD LUCK.
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Revise Medicine Member
Pre Registration House Officer Rank
Posts: 14
Join Date: Mar 2006
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12-01-2006, 06:52 PM
Yeah, e is definitely false
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