![]() Na+ is essential for the production of hydrochloric acid in the stomach. Helps regulate blood pressure and water balance in cells. The sodium content of the blood is a result of balance between dietary intake and renal excretion.Ħ Function of Na+: Na+ plays an important role in maintains normal plasma pH. The concentration of Na+ inside cells is only 5 mmol/L compared to 140 outside. Cl- and bicarbonate (HCo- 3) are main anions in ECF.ĥ Sodium (Na+): Sodium is the major positive ion of the ECFs (out side of the cell). ![]() Changes in the concentration of one or more of these ions can occur during various acute and chronic disease states and can lead to serious consequences Inside cells the main anions are protein and phosphate. The concentrations of these ions in the bloodstream remain fairly constant throughout the day in a healthy person. Sodium (Na+), potassium K+, chloride Cl-, calcium (Ca+2), magnesium (Mg+2), bicarbonate (HCO3-), phosphate (Po4-2), and sulfate (So2-4). It is called electrolytes because of their charge and consequent movement in an electrical field. Sodium (Na+) is the principal extracellular cation and the K+ the principal intracellular cation.ģ Electrolytes Electrolytes are positively and negatively charged ions which are in solution in all body fluids. ![]() There are major differences between the chemical composition of the intra and extracellular fluids. ICF is the volume of fluid inside the cells, and ECF is that volume of fluid which lies outside cells. 2- The extracellular fluid compartment (ECF). There are two main body compartments 1- The intracellular fluid compartment (ICF). The major body fluid is water, roughly 70% of normal persons body weight is water.
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