Q4 / 180 · AIIMS 2001 · Botany

A human RBC is placed in $1.5 \%$ salt solution. It will

  • A
    swell up
  • Correct answer
    B
    shrink
  • C
    remain unaffected
  • D
    burst.

Solution

For human $\mathrm{RBC}, 0.9 \%$ salt solution is isotonic. Hence a medium of $1.5 \%$ salt solution would be hypertonic i.e. more concentrated. Hence, the RBC will shrink due to exosmosis.

Hence, the correct answer is option: 'B'.

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