MICROANATOMY

Detailed explanation-1: -The combination of an individual motor neuron and all of the muscle fibers that it innervates is called a motor unit. The number of fibers innervated by a motor unit is called its innervation ratio.

Detailed explanation-2: -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-3: -When a motor neuron is activated, all of the muscle fibers innervated by the motor neuron are stimulated and contract. The activation of one motor neuron will result in a weak but distributed muscle contraction.

Detailed explanation-4: -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-5: -The neuromuscular junction is essentially comprised of two different types of cells: skeletal muscle cells and a type of nerve cell called motor neurons. Motor neurons are covered with ion channels, which open in response to electrical signals from the brain.