How might additional amouts of substance x enter cells

Reference no: EM13155207

Substance X is a charged molecule of small molecular weight. It is found at higher concentrations inside of cells than outside. How might additional amouts of substance X enter cells?

a. diffusion through a channel
b. diffusion through the lipid bilayer
c. active transport
d. all of the above
e. none of the above

Reference no: EM13155207

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