Explain how a message is communicated from neurons to muscle fibers causing a contraction, include all of the these: (a) Sodium (i) Synaptic vesicles (b) Nicotinic acetylcholine receptor (nACh) (j) T-tubule (c) Myosin (k) Sarcoplasmic reticulum (d) Actin (l) Dihydropyridine receptor (e) Acetylcholine (ACh) (m) Ryanodine receptor (f) Depolarization (n) Synaptic terminal (g) Motor end plate (o) Sarcolemma (h) Acetylcholinesterase (AChE) (p) Sarcomere.