Heitner592
Answered

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When is facilitated diffusion necessary? a) when the molecules are too large b) when the molecules are insoluble c) when the direction of movement is opposite to natural diffusion c) none of the above

Sagot :

lrathburn
Facilitated diffusion is necessary when B. the molecules are insoluble. Insoluble molecules need help to diffuse across membrane, this is also called passive transport. 
setoreed345

Answer:

the molecules are insoluble

Explanation:

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