Assertion (A) : Blood cells collapse when suspended in saline water Reason (R): Cell membrane dissolves in saline water

Question

Assertion (A) : Blood cells collapse when suspended in saline water Reason (R): Cell membrane dissolves in saline water, Both (A) and (R) are correct and R is the correct explanation of A, Both (A) and (R) are correct, but R is not the correct explanation of A, (A) is correct but (R) is not correct, (A) is incorrect but (R) is correct

MARKS App · Accepted Answer

The osmotic pressure associated with the fluid inside the blood cell is equivalent to that of 0.9% (mass/ volume) sodium chloride solution, called normal saline solution and it is safe to inject intravenously. On the other hand, if we place the cells in a solution containing more than 0.9% (mass/volume) sodium chloride, water will flow out of the cells and they would shrink. Such a solution is called hypertonic. If the salt concentration is less than 0.9% (mass/volume), the solution is said to be hypotonic. In this case, water will flow into the cells if placed in this solution and they would swell due to osmosis. Cell membrane does not dissolve in saline water.c Hence, A is correct R is not correct.

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