Prep4USMLE Forum » USMLE Step 1 Forum » Physiology Forum |   ANP after hemorrage

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s_shahraz Forum Newbie Topics: 2 Posts: 5	02/27/08 - 01:37 PM             #1 Anybody knows why ANP goes up after hemorrhage? This is a bit counterintuitive! When blood volume decreases the ANP should go down to reserve some water for the body. But it really increases. I found it in Goljan's notes and checked the truth with some articles.
s_shahraz Forum Newbie Topics: 2 Posts: 5	02/27/08 - 02:25 PM             #2 Sorry if I write back to myself here. I figured that out in this way: no matter what the underlying problem is ANP goes up to counteract the effects of angiotensin which is increased after hypovolemia. I just wonder if this is Sodium that stimulates ANP or volume or both.
new_n_lost Politically InCorrect Topics: 653 Posts: 6,081	02/27/08 - 05:17 PM             #3 Where did you find this information can you share please. ___________________ FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
Ig F Forum Elite Topics: 3 Posts: 439	02/27/08 - 05:38 PM             #4 ANP is secreted in response to: Atrial distention, stretching of the vessel walls Sympathetic stimulation of β-adrenoceptors Raised sodium concentration (hypernatremia) Angiotensin-II Endothelin, a potent vasoconstrictor ___________________ i m not perfect but i wanna get close to it......
new_n_lost Politically InCorrect Topics: 653 Posts: 6,081	02/27/08 - 05:41 PM             #5 Ig F wrote: ANP is secreted in response to: Raised sodium concentration (hypernatremia) In Hemorrhage ?? in practicality or in theory??? may be i have missed something or overlooked it so a little help here please. ___________________ FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
Ig F Forum Elite Topics: 3 Posts: 439	02/27/08 - 05:41 PM             #6 The overall effect of ANP on the body is to counter increases in blood pressure and volume caused by the renin-angiotensin system. check out this one.... http://en.wikipedia.org/wiki/Atrial_natriuretic_p... ___________________ i m not perfect but i wanna get close to it......
s_shahraz Forum Newbie Topics: 2 Posts: 5	02/27/08 - 05:42 PM             #7 I don't remember the reference. It was one of the books that you could find its full text in Google. Sorry!
Ig F Forum Elite Topics: 3 Posts: 439	02/27/08 - 05:55 PM             #8 well after hemoorhage in Nervous tissues Endothelin is released which causes vasoconstriction which stimulates ANP release.. Widely distributed in the body, receptors for endothelin are present in blood vessels and cells of the brain, choroid plexus and peripheral nerves... ___________________ i m not perfect but i wanna get close to it......
Ig F Forum Elite Topics: 3 Posts: 439	02/27/08 - 05:56 PM             #9 http://en.wikipedia.org/wiki/Endothelin ___________________ i m not perfect but i wanna get close to it......

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