Question

I don't think glucose moves to the cell by diffusion because of being non-lipid soluble and its large size. So, how can it enter the cell?

Answer 1

Answer:

Glucose cannot move across a cell membrane via simple diffusion because it is simple large and is directly rejected by the hydrophobic tails. Instead it passes across via facilitated diffusion which involves molecules moving through the membrane by passing through channel.

As facilitated diffusion is a passive transport mechanism in which carrier proteins shuttle molecules across the cell membrane without using the cell's energy supplies. ... so the carrier proteins bind to glucose, which causes them to change shape and translocate the glucose from one side of the membrane to the other.