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Electrolytes determine the chemical and physical reactions of fluids. These figures are standard values which are quoted frequently and are average values. The hypothetical adult female contains 55 of her body weight as water: this lower percent being due to a higher fat content.
BODY FLUID COMPARTMENTS MEASUREMENT CHEMICALS FREE
Free water loss, which is analogous to "free water clearance" in renal function, showed a strongly inverse correlation with in sweat (r = -0.97, P less than 0.001). (60 body weight) Fluid / Electrolyte / Acid-Base Balance Body Fluids: Cell function depends not only on continuous nutrient supply / waste removal, but also on the physical / chemical homeostasis of surrounding fluids 1) Water: (universal solvent) Clinical Application: The volumes of the body fluid compartments are measured by the dilution. Each fluid compartment of the body has a distinctive pattern of electrolytes. The 70 kg standard male contains 42 liters of water - 60 of his body weight.
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The increase in plasma osmolality was a function of the loss of free water (delta FW), estimated from the equation delta FW = delta TW - (loss of osmotically active substance in sweat and urine)/(control plasma osmolality) (r = -0.79, P less than 0.01). The decrease in the ICF space was correlated with the increase in plasma osmolality (r = -0.74, P less than 0.02). The markers for total body water are substances that are distributed. The change in the extracellular fluid space (delta ECF) was estimated from chloride distribution and the change in the intracellular fluid space (delta ICF) was calculated by subtracting delta ECF from delta TW. In humans, the volumes of the body fluid compartments are measured by the dilution. We measured plasma volume, plasma osmolality, and, , and in plasma, together with sweat and urine volumes and their ionic concentrations before and after dehydration.
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After dehydration, the subjects rested for 1 h in a thermoneutral environment (28 degrees C, less than 30% rh), after which time the changes in the body fluid compartments were assessed. antipyrine,11 and deuterium oxide (heavy water).12 For various reasons, the first three of these substances are un satisfactory. The plasma membrane is permeable to water but not small solutes or proteins. Each of these compartments is separated by the barriers shown above with unique physio-chemical properties. To investigate the influence of in sweat on the distribution of body water during dehydration, we studied 10 volunteer subjects who exercised (40% of maximal aerobic power) in the heat for 90-110 min to produce a dehydration of 2.3% body wt (delta TW). The ECF is itself divided between fluid within the vasculature itself, known as plasma, and that outside the vasculature, known as the interstitial fluid.