Answer to Question #173161 in Cell Biology for Alike

Question #173161

State what happens to the following in excess sodium chloride intake

I. ECF osmolarity before water shif

II. movement of water across ECF and ICF

III. Volume of ECF and ICF after water shift

IV. Osmolarity of ICF and ECF after water shift

Expert's answer

i) When the ECF solute concentration is lower (hypotonic) than the ICF, water rushes into the cell making it swell and possibly explode.

ii) otential is created by sodium-potassium pumps in the cell membrane, which pump sodium ions out of the cell, into the ECF, in return for potassium ions which enter the cell from the ECF.

iii) Water ater will move into and out of cells and tissues, depending on the. The intracellular fluid (ICF ) is the fluid within cells.Both plasma and the ECF contain high concentrations of sodium and chloride

iv) As cell membranes in general are freely permeable to water, the osmolality of the extracellular fluid (ECF) is approximately equal to that of the intracellular fluid (ICF). Therefore, plasma osmolality is a guide to intracellular osmolality.

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