Question

inside of cell
protein pump
high concentration
energy
outside of cell
low concentration

the model illustrates facilitated diffusion because protein channels allow solute particles to cross the cell membrane.
the model illustrates diffusion because solute particles are moving from an area of higher concentration to an area of lower concentration.
the model illustrates active transport because energy is required for solute particles to cross the cell membrane.
the model illustrates osmosis because water molecules are moving from an area of higher concentration to an area of lower concentration.

Explanation:

1. Analyze each option:

• Facilitated diffusion: Does not require energy, moves from high to low concentration through protein channels. But in the model, energy is used, so this is incorrect.
• Diffusion: Moves from high to low concentration without energy or protein pumps (simple diffusion) or with protein channels (facilitated), but no energy. The model has energy, so incorrect.
• Active transport: Requires energy (shown as "Energy" in the model), moves solute particles from low concentration (outside) to high concentration (inside), which matches the model.
• Osmosis: Movement of water, not solute particles, so incorrect.

Answer:

The model illustrates active transport because energy is required for solute particles to cross the cell membrane.