Question

Why can’t glucose move across the membrane by simple diffusion but water and oxygen can?

Por qué la glucosa no puede moverse a través de la membrana por simple difusión, pero el agua y el oxígeno si?

Answer 1

Although glucose can be more concentrated outside of a cell, it cannot cross the lipid bilayer via simple diffusion because it is both large and polar, and therefore, repelled by the phospholipid membrane.