PHYSIOLOGY OF MUSCLE CONTRACTION
The primary function of a muscle is to generate force and to produce movement the molecular structure and mechanism involved in contraction are more or less similar in different types of muscles the skeletal muscle may be taken as prototype to understand these mechanisms
neuromuscular junction or myoneuronal junction
A muscle is made up of number of motor units a motor unit is a single nerve fibre alongwith all the muscle fibres which it supplies myoneuronal junction is the junction between the nerve ending and the muscle
The magnified view of myoneuronal junction shows a space between two endings known as synaptic cleft the terminal membrane of the nerve is known as pre synaptic membrane whereas the membrane over the muscle facing the nerve is known as post synaptic membrane the part of muscle facing presynaptic membrane is also known as motor end plate the nerve contains number of small vesicles in which lie the transmitter they are termed as synaptic vesicles
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