2. Facilitated diffusion >2.1 Facilitated diffusion via carrier >2.2 Facilitated diffusion through channel >2.2. 1 Voltage-gated ion channel >2.2.2 Chemically-gated ion channel >2. 2. 3 Mechanically-gated ion channel >2.2 4 Water channel30 2. Facilitated Diffusion ➢2.1 Facilitated diffusion via carrier ➢2.2 Facilitated diffusion through channel ➢2.2.1 Voltage-gated ion channel ➢2.2.2 Chemically-gated ion channel ➢2.2.3 Mechanically-gated ion channel ➢2.2.4 Water channel