Now, we have many different types of examples of channels that exist inside our body. And two examples that we're going to focus on in future lectures will be voltage gated channels and gap junctions. So voltage gated channels are used by our neurons to basically create that action potential, while gap junctions are used by, for instance, our cardiac muscle cells to create this forceful contraction of the heart. Now let's move on to membrane pump. So what exactly is the major difference between membrane channels and membrane pump? So, both of these types of transport, membrane proteins basically move large and polar molecules.