What kind of passive transport requires a transport protein or other protein channel?

Question

Responses

Simple diffusion
Simple diffusion

Osmosis
Osmosis

Facilitated diffusion
Facilitated diffusion

Complex osmosis

Answer 1

The kind of passive transport that requires a transport protein or other protein channel is facilitated diffusion. This process allows substances that cannot easily cross the cell membrane to move across it with the help of specific proteins, without the expenditure of energy. Simple diffusion and osmosis typically do not require any transport proteins.