Question

Diffusion during which the substance to be transported binds selectively to a membrane-spanning protein, which helps the process along, is called ________?

1) osmosis
2) facilitated osmosis
3) simple diffusion
4) facilitated diffusion
5) active transport

Answer 1

Facilitated diffusion is the process during which substances bind to membrane-spanning proteins to help transport them across the plasma membrane.

Step-by-step explanation:

Facilitated diffusion is the process during which the substance to be transported binds selectively to a membrane-spanning protein, which helps the process along. This type of transport allows substances that would not easily or quickly diffuse across the plasma membrane to be transported. Facilitated diffusion involves specific transport proteins that form channels or pores in the membrane, allowing certain substances to pass through.