Which is one of the major electrolytes in the extracellular fluid compartment?
Extracellular fluid (ECF) is the body's fluid outside of the cells (fluid in the cell is called intracellular fluid). In humans, 97% of the extracellular fluid consists of blood plasma and interstitial fluid, while the rest is transcellular fluid. ECF is critical for bodily function as it bathes and transports many molecules and blood cells in the body. It is therefore maintained within a very narrow range by homeostatic mechanisms. The interstitial fluid is the fluid between blood vessels and cells, and consists of water soluble sugars, salts, amino acids and white blood cells (among other materials). Its functions include exchanging nutrients with the capillaries and holding waste products discharged from cells.
Answer and Explanation:
Chloride is the second most abundant electrolyte in the ECF with a concentration of 98-106mM/L (the most abundant is sodium). It is important in the maintenance of a neutral electrical gradient along with sodium. Its concentration is maintained by the kidney as it is passively reabsorbed in the proximal convoluted tubules and actively reabsorbed in the loop of Henle.
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from Nutrition 101: Science of NutritionChapter 8 / Lesson 1