Question

some transport processes use transport proteins in the plasma membrane, but do not require atp. this type of transport is known as ______.

○ simple diffusion

○ active transport

○ facilitated diffusion

○ exocytosis

○ endocytosis

Explanation:

• Simple diffusion: Does not use transport proteins, so eliminate.
• Active transport: Requires ATP, so eliminate.
• Facilitated diffusion: Uses transport proteins (like channels or carriers) and moves substances down their concentration gradient, so no ATP needed.
• Exocytosis and endocytosis: Are bulk transport processes that require ATP and don't match the description.

Answer:

C. facilitated diffusion