NUTR.2060 Lecture Notes - Lecture 14: Angiotensin-Converting Enzyme, Orange Juice, Diabetes Mellitus Type 1
28 Mar 2017
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Water: maintaining the right amount of water in the body is essential to life, adults can survive several weeks without food, but only days without water. There are no stores for water in the body, like for the other macronutrients: about 55% of adult"s body weight is water: Associated with muscle mass and glycogen: found in 2 compartments: Intracellular fluid: 2/3 of the body"s water. Extracellular fluid: interstitial and blood, body uids also contain solutes. Chemicals dissolved in the uid: e. g. Maintenance of fluid balance: water in each compartment is controlled by solute concentrations, via: Transmembrane pumps: moves chemicals or ions against concentration gradient, keep normal water volume and electrolyte concentrations. Osmosis: water moves from the side with a low solute concentration to the side with a higher solute concentration. Functions of water: maintenance of blood volume. Directly in uences blood pressure: transport of nutrients, solvent in metabolic reactions, temperature regulation, fluid synthesis.
