q--------------------red blood cell - super99

[ArchivalUser]

its DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD

[ArchivalUser]

The answer is: D

If a red blood cell is placed in a hypotonic solution, the cell will swell until its osmolarity equals the osmolarity of the extracellular fluid. The tonicity of the extracellular solution is equal to the osmolarity of those particles within the extracellular solution that are not permeable to the cell membrane. Because urea is able to permeate the cell membrane, its effective osmotic pressure is zero. Therefore, red blood cells placed in a urea solution will swell until hemolyzed. The osmolarity of the NaCl solution is approximately the same (300 mmol) as that of the red blood cell and, therefore, will not cause any change in intracellular volume.

[ArchivalUser]

yeahhhhh...got it right...yaaaaaayyyy...it was a good qn my friend

[ArchivalUser]

super99..

BB ans also seems to be correct(unless it s 150mM)

is it??

[ArchivalUser]

oops...... i didnt see properly, D is the correct answer coz kcl is a hpertonic sol and urea is

hypotonic sol so definetely rbc will swell in urea