MICROANATOMY

Detailed explanation-1: -motor unit is the term applied to a single motor neuron and all of the muscle fibers that it stimulates.

Detailed explanation-2: -Alpha motor neurons are relatively large motor neurons that innervate skeletal muscle and cause the muscle contractions that generate movement. Specifically, they innervate extrafusal muscle fibers, which are standard muscle fibers.

Detailed explanation-3: -The given statement is “false”. A motor neuron and all the myocytes (muscle cells) that it stimulates are called a motor unit, not a motor end plate. A motor end plate also called a neuromuscular junction, is a chemical synapse formed between the terminal branches of the motor neuron’s axon and a target muscle cell.

Detailed explanation-4: -motor unit is a motor neuron plus all the skeletal muscle fibers it stimulates. Motor units are therefore the most basic unit of a skeletal muscle and are what causes a contraction.