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Question

If kept in 0.8% NaCl, RBCs will

A
Shrink
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B
Remain same
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C
Burst
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D
None of the above
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Solution

The correct option is B Remain same
The solution of salt or salts that is essentially isotonic with tissue fluids or blood, is physiological saline.
0.8% salt solution is physiological saline and is thus, isotonic.
In isotonic solutions, the cells remain the same as the osmotic pressure outside the RBC is same as the pressure inside the cells.
Thus, the correct answer is option B.

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