Question

what type of transport is shown in the diagram?
protein pump
endocytosis
facilitated diffusion
exocytosis

Explanation:

• Protein pump: Requires energy (ATP) to move substances against their concentration gradient. The diagram does not show energy consumption.
• Endocytosis: Involves the cell membrane engulfing substances to bring them into the cell. This is not depicted in the diagram.
• Facilitated diffusion: Uses channel or carrier proteins to move substances (usually polar or large molecules) down their concentration gradient. The diagram shows molecules moving through a channel protein from an area of higher (extracellular) to lower (intracellular) concentration.
• Exocytosis: Expels substances from the cell. Opposite of what the diagram shows.

Answer:

Facilitated diffusion