First slide

Means of Transport

Question

You are monitoring the diffusion of NaCl molecules across a membrane. Which of the following will result in the fastest rate of diffusion?

Moderate

A

An internal concentration of 5% and an external concentration of 60%
B

An internal concentration of 35% and an external concentration of 40%
C

An internal concentration of 55% and an external concentration of 50%
D

An internal concentration of 35% and an external concentration of 60%

Solution

Diffusion rate depends on the value of concentration gradient that exist across the membrane. Higher is the value of concentration gradient, higher is the diffusion rate.

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