Question

1. facilitated diffusion (2.7) what is facilitated diffusion? what cell components are needed and what molecules move through the membrane this way? is this process active or passive? what are aquaporins?

Explanation:

Facilitated diffusion is a type of passive - transport across the cell membrane. It requires membrane - spanning proteins (channel proteins or carrier proteins). Molecules like glucose, amino acids, and ions (for channel - mediated) move through the membrane this way. Aquaporins are a type of channel protein specifically for water molecules. Passive transport does not require energy input from the cell.

Answer:

Facilitated diffusion is the passive movement of molecules across the cell membrane with the help of membrane - spanning proteins (channel or carrier proteins). Cell components needed are channel proteins or carrier proteins. Molecules such as glucose, amino acids, and some ions move through the membrane this way. This process is passive. Aquaporins are channel proteins that allow water molecules to pass through the cell membrane.