PHGY 209 Lecture Notes - Lecture 21: Dynamic Equilibrium, Water Intoxication, Body Water
16 Sep 2016
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A negative water balance: reduced intake, excessive loss from gut, excessive sweating, excessive loss in expired air (e. g. dry air at high altitudes, excessive loss in urine. Total body water = 60% of body mass. There are 2 major compartments: one of these is further subdivided into, 2 major subcompartments o 2 minor subcompartments . These differ in: size o composition o function. Compartments and subcompartments must not be regarded as rigidly isolated chambers, but rather as compartments, continuously interacting in a dynamic fashion with water exchanging freely between them. 2 major subcompartments: plasma, interstitial fluid (isf) 2 minor subcompartments o lymph: transcellular fluid. A network of blind-ended terminal tubules which coalesce to form larger lymphatic vessels, which converge to form large lymphatic ducts, which drain into the large veins in the chest. Transcellular fluid: aggregate of small fluid volumes secreted by specific cells into a number of body cavities (lined by epithelial cells) and having specialized functions.
