Question

explain the transportation across the membrane by diffusion in hypotonic , isotonic and hypertonic​

Answer 1

Answer:

If a cell is in a hypertonic solution, the solution has a lower water concentration than the cell cytosol, and water moves out of the cell until both solutions are isotonic. Cells placed in a hypotonic solution will take in water across their membranes until both the external solution and the cytosol are isotonic.

Answer 2

Answer:

The transportation is as follows:

Explanation:

In Isotonic soln. the concentration of water is same in the solution and the cell sap, so no osmosis occurs and thus no effect on the cell.

In hypotonic soln. the concentration of water is more and solution ,is less in the solution than cell sap so endosmosis occurs and this causes turgidity of cell(cells become swollen).

In hypertonic soln. the concentration of water is less and solution is more in the solution than cell sap so exosmosis occurs  which makes the cell flaccid  (shriveled up).

Note : And in all of the following the transportation occurs from the region of lower concentration to  a region of higher concentration