Question

For each substance determine if it would cross a membrane by simple or facilitated diffusion.

Facilitated Diffusion

Answer 1

Facilitated diffusion is the movement of substances down their concentration gradient with the help of specific membrane receptors or channel proteins. It does not require cellular energy and is a type of passive transport. Examples of substances that undergo facilitated diffusion include glucose and certain ions.

Step-by-step explanation:

Facilitated diffusion is the movement of substances down their concentration gradient with the help of specific membrane receptors or channel proteins. It is a type of passive transport, meaning it does not require cellular energy. Substances that undergo facilitated diffusion cannot freely pass through the lipid bilayer of the cell membrane due to factors such as size, charge, and polarity. Examples of substances that cross the membrane by facilitated diffusion include glucose and certain ions.