urine notes

urine notes - 11/21 Sorry if any of these notes are not...

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11/21 Sorry if any of these notes are not clear. You might look at figures 37-11 and 37-12 while reading though the notes. He referred to those a lot during lecture. Water can only be recovered from tubule to blood in presence of ADH Higher osmolarity in interstitial fluid dictates higher concentration in which urine can be produced In absence of recovery in collecting ducts, polyurea (overproduction of urine) and polydipsia (drinking extra fluid) occur o Genetic mutations in V-2 receptors cause this o Also caused by deranged aquaporin channels and absence of ADH When Na + levels are low, aldosterone production is stimulated o Known as hyponatremia Hypotension (RAS) stimulates aldosterone -ANP is part of the protective method involving the right atrium that protects the c.v. system from excessive blood volume (hypervolemia) o ANP inhibits aldosterone The brain’s local sensing of osmolarity in the extracellular fluid (osmoregulation) is the main regulation of ADH
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This note was uploaded on 09/18/2010 for the course NS 3410 taught by Professor Obrien/swanson during the Spring '08 term at Cornell.

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urine notes - 11/21 Sorry if any of these notes are not...

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