Embedded in the cell membrane act as gates and transportation systems that allow selected substances to pass through the membrane.

Protein complexes

Explanation:

There is a lipid bilayer in which the protein molecules are embedded. They do not exist as single elements of the lipid membrane in a form of glycoproteins or membrane proteins, they work as diffusing complexes within the membrane. They perform important functions for the cell; such as ion and metabolite transport, signaling, cell adhesion, and migration.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.