The inflow of sodium (Na + ) ions in the plasma membrane through the membrane channel regulates the depolarization of the nervous and muscular system and their function. It is the main cation present in the extracellular fluid (ECF) and associated with regulation of blood plasma osmolarity. The increased concentration of sodium raises the osmolarity of the blood. Also, it regulates the level and distribution of total body water among several fluid compartments. Gradients of Na + ions across the cell generate potential energy that helps to transport other solutes. Also, it regulates body heat and pH of the ECF.

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Chapter 24, Problem 7WWTS

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The inflow of sodium (Na⁺) ions in the plasma membrane through the membrane channel regulates the depolarization of the nervous and muscular system and their function. It is the main cation present in the extracellular fluid (ECF) and associated with regulation of blood plasma osmolarity. The increased concentration of sodium raises the osmolarity of the blood. Also, it regulates the level and distribution of total body water among several fluid compartments. Gradients of Na⁺ ions across the cell generate potential energy that helps to transport other solutes. Also, it regulates body heat and pH of the ECF.

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