MICROANATOMY

Detailed explanation-1: -EXPLANATION: The junction between a motor neuron and the sarcolemma of the muscle fibre is called the motor end plate . It is formed at the sites, where the terminal branches of the axon of a motor neuron contact with a muscle cell.

Detailed explanation-2: -The neuromuscular junction (NMJ) is a synaptic connection between the terminal end of a motor nerve and a muscle (skeletal/ smooth/ cardiac). It is the site for the transmission of action potential from nerve to the muscle.

Detailed explanation-3: -Answer and Explanation: The gap between the axon terminal of a motor neuron and the sarcolemma of a skeletal muscle cell is known as the neuromuscular junction.

Detailed explanation-4: -The axon terminal rests within a primary depression of sarcolemma, the primary cleft, and contains numerous small vesicles that contain acetylcholine (ACh), the neurotransmitter for excitation of skeletal myofibers. Each vesicle contains a quantum of neurotransmitter, consisting of 6000 to 8000 molecules of ACh.

Detailed explanation-5: -Between the synaptic end bulbs of the neuron and the cell membrane of the muscle fiber (the sarcolemma) lies a space known as the synaptic cleft, which is the final component of the neuromuscular junction.