Question

under what Osmosis condition the water does not enter a cell​

Answer 1

There are mainly two conditions in which water does not enter the cell.

First condition :

When the cell is placed in a hypertonic solution ( having higher solute concentration) , the ambient chamber full South the water inside the cell leading to contraction of the the cytoplasm along with the nucleus. This is known as plasmolysis.

Second Condition:

If the cell is placed in an isotonic solution equivalent amounts of water enter the cell from the ambient chamber as well as proportional amount of water goes out of the cell into the ambient chamber. As a result we can say that net flow of water inside the cell or outside the cell is zero

Answer 2

Answer:-

Permeability to water is increased by water-channel proteins discussed below. Water tends to move across a membrane from a solution of low solute concentration to one of high. Or, in other words, since solutions with a high amount of dissolved solute have a lower concentration of water, water will move from a solution of high water concentration to one of lower. This process is known as osmotic flow.

Osmotic pressure is defined as the hydrostatic pressure required to stop the net flow of water across a membrane separating solutions of different compositions , the “membrane” may be a layer of cells or a plasma membrane. If the membrane is permeable to water but not to solutes, the osmotic pressure Under these conditions, there is no net movement of solvent in this case, the amount of water entering and exiting the cell's membrane.