
Julia J. answered 11/12/20
Patient, Knowledgeable Doctor, Specializing in Neuro and Anatomy
Hi Elena!
Innervate means to 'supply nerves to.' So in your case, we are supply nerves to a skeletal muscle.
Each skeletal muscle fiber in a skeletal muscle is innervated by a single motor axon (part of a nerve cell).
This axon may also innervate other muscle fibers, as well. If that is the case, all of the fibers innervated by the same axon are called a motor unit.
Excitation signals from the nerve cell are the only way to functionally activate the skeletal muscle fiber to contract.