Question

Differences between endosmosis and exosmosis

Answer 1

ENDOSMOSIS

●The solvent moves into the cell

(Endo = inside)

●Osmosis towards the inside of a cell

●Occurs when there is lower osmotic pressure

●Hypotonic solutions induce endosmosis in cells (distilled water is hypotonic because it contains no solute)

●Higher water potential of the surrounding areas when compared to the cytosol (watery part of a cytoplasm in a cell)

●Cells swell as result

●Example: Raisins swell when placed in normal water

EXOSMOSIS

●The solvent moves out of the cell

(Exo = outside)

●Osmosis towards the outside of a cell

●Occurs when the osmotic pressure is higher

●Hypertonic solutions induce exosmosis in cells (Intravenous Fluid is often hypertonic as it has many solutes)

●Lower water potential of the surrounding areas when compared to the cytosol

●Cells shrink as result

●Example: Raisins shrivel when placed in concentrated salt solution

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Answer 2

Answer:

Endosmosis

When a cell is placed in a hypotonic solution, the water moves inside a cell and swells. This movement of water inside a cell is known as endosmosis. This happens because the solute concentration of the surrounding solution is less than that inside the cytoplasm.

Exosmosis

When a cell is placed in a hypertonic solution, the water moves out of the cell and the cell becomes flaccid. This movement of water out of the cell is known as exosmosis. This happens because the solute concentration of the surrounding solution is higher than that inside the cytoplasm.

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