Integral Proteins:These are permanently attached within the plasma membrane. They perform various functions including acting as channels for transport of materials.
Ion Channels: These are pore-forming membrane proteins whose functions include establishing a resting membrane potential, shaping action potentials and other electrical signals by gating the flow of ions across the cell membrane.
Transport Proteins:These are involved in the movement of ions, small molecules, or macromolecules, such as another protein, across a biological membrane.