What is used in facilitated diffusion to assist the transport of sugar and sodium molecules?

1 Answer
Dec 6, 2017

Proteins embedded in the cell membrane called channels.

Generally, these are gated by some mechanism. For instance, sodium channels are generally closed in neurons, lest a certain voltage gradient is present.

Or, NMDAR need a certain voltage present in addition to a ligand binding to its receptor (e.g. glutamate, D-serine, et cetera).