Question

some transport processes use transport proteins in the plasma membrane, but do not require atp. this type of transport is known as _____. view available hint(s) endocytosis facilitated diffusion active transport exocytosis simple diffusion

Explanation:

1. Recall the definitions of each transport type:

• Simple diffusion: Does not use transport proteins, molecules move directly through the lipid bilayer (e.g., small non - polar molecules like O₂, CO₂).
• Facilitated diffusion: Uses transport proteins (channel or carrier proteins) to move molecules across the membrane, and it is a passive process (does not require ATP, moves molecules down their concentration gradient).
• Active transport: Requires ATP and transport proteins, moves molecules against their concentration gradient.
• Endocytosis and exocytosis: Are bulk transport mechanisms that involve the movement of large particles or bulk fluid, and they require ATP.

1. The problem states that the transport process uses transport proteins but does not require ATP. This matches the definition of facilitated diffusion.

Answer:

facilitated diffusion