MCAT Question of the Day
    •

    Q:

    		 Which of the following choices does NOT directly affect the rate of diffusion of a substance across a membrane?
    		 

    A

    		 Concentration gradient

    B

    		 Permeability of the membrane to the diffusing substance

    C

    		 Cellular volume

    D

    		 Surface area across which diffusion is taking place



    Membrane Transport and Signalling |
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