Why does the rate of diffusion of a substance | vedclass

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(C) The rate of diffusion of a substance along the concentration gradient does not increase continuously as the concentration difference increases in

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$100 \%$ saturation of carrier protein after some time

Vedclass · Answer

(C) The rate of diffusion of a substance along the concentration gradient does not increase continuously as the concentration difference increases in the case of facilitated diffusion.This occurs because facilitated diffusion is mediated by specific carrier proteins.As the concentration gradient increases,the rate of transport increases initially,but it reaches a maximum limit when all available carrier proteins are occupied or saturated.Once the carrier proteins reach $100 \%$ saturation,the rate of transport cannot increase further,regardless of any additional increase in the concentration gradient.

Why does the rate of diffusion of a substance along the concentration gradient not increase continuously,even when the concentration difference of the molecules across the membrane increases?

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