the process by which a protein assists in passive transport

A) diffusion
B) facilitated diffusion
C) osmotic pressure
D) active transport
E) receptor-mediated endocytosis
F) osmosis

Facilitated Diffusion

A process of passive transport, with the aid of integral membrane proteins, allowing substances to move across cell membranes without energy expenditure.

Receptor-Mediated Endocytosis

A cellular process by which cells internalize molecules (like hormones, nutrients, and proteins) by the inward budding of plasma membrane vesicles containing proteins with receptor sites specific to the molecules being internalized.

Passive Transport

Membrane-crossing mechanism that requires no energy input.