And these motor neurons connect to our skeletal muscles. So basically, these motor neurons pick up the electrical signals that are produced by our brain and they carry these electrical signals in the form of an action potential down their axon and onto the axon terminal that connects to the cell membrane of our muscle cell. So this is our muscle cell, also known as a muscle fiber, also known as the myocyte. And the muscle cell is wrapped around with a special membrane known as our sarcolema. Now, the sarcolema consists of these imaginations, these tunnels that basically go deep into the cell, and these are known as T tubules or transverse tubules. They are shown in the diagram with these white dots.