Final answer:
Three properties of ion channels are specificity, gating, and different types of gated channels.
Step-by-step explanation:
Three properties of ion channels are:
- Specificity: Ion channels are very specific and only allow certain ions to pass through the cell membrane.
- Gating: Ion channels can be either open at all times or 'gated,' meaning their opening is controlled.
- Gated Channel Types: There are different types of gated ion channels, such as receptor-ion gates, mechanically-gated channels, and voltage-gated channels.