Question

write in brief A red blood cell is kept in concentrated saline solution

Answer 1

It relies on upon what sort of salt solution you are utilizing. 
If the salt solution is hypotonic as for RBCs (that is a salt solution is rarer in osmotically dynamic particles than intracellular plasma) at that point the water atoms will osmosis into the RBCs from the solution and it may prompt bursting of RBCs.

In the event that the salt solution is hypertonic (inverse of hypotonicity) at that point, the water particles will osmosis out of the RBCs prompting plasmolysis (broad shrinkage of RBCs because of the hypertonic condition).

In any case, there may likewise exist Isotonicity between the intracellular and extracellular liquids (that is a grouping of osmotically dynamic particles is same in both liquids). Such Isotonicity prompts no net development of water particles between the liquids. This Isotonicity has touched base at 0.3M(molar) NaCl solution (approx).

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Answer 2

When a Red Blood Cell is placed in concentrated saline solution exosmosis occurs and the RBCs shrink due to excess loss of water. Osmosis process takes place.

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