So, before we actually contract our skeletal muscle, the brain has to initiate, has to create that electrical signal in the form of an action potential. So it creates the action potential and it sends the action potential down to our somatic nervous system. And the somatic nervous system contains motor neurons. 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.