MICROANATOMY

Detailed explanation-1: -Each skeletal muscle fiber is controlled by a motor neuron, which conducts signals from the brain or spinal cord to the muscle. The area of the sarcolemma on the muscle fiber that interacts with the neuron is called the motor end plate.

Detailed explanation-2: -Any given muscle fiber is innervated by just one motor neuron. A motor neuron and the muscle fibers it innervates are called a motor unit. The muscle fibers within a motor unit usually have similar mechanical properties.

Detailed explanation-3: -A motor unit is made up of a motor neuron and all of the skeletal muscle fibers innervated by the neuron’s axon terminals, including the neuromuscular junctions between the neuron and the fibres. Groups of motor units often work together as a motor pool to coordinate the contractions of a single muscle.

Detailed explanation-4: -The Neuromuscular Junction Every skeletal muscle fiber in every skeletal muscle is innervated by a motor neuron at the NMJ. Excitation signals from the neuron are the only way to functionally activate the fiber to contract.

Detailed explanation-5: -A single motor neuron and all the muscle fibers it innervates is known as a single motor unit.