Answer & Explanation
D) Guanosine monophosphate to guanine
“Guanosine monophosphate to guanine.” This is a part of the pathway of purine degradation by 5I – nucleotidase. Steps involved in action of nerve impulse are:
• Release of acetylcholine during exocytosis into the synaptic cleft.
• Activation of acetylcholine receptor by binding of 2 molecules of released acetylcholine which opens the channels of small cations such as Na+.
• Production of muscle action potential due to inflow positively charged sodium ions.
• Termination of acetylcholine by acetylcholine esterase which is attached to collagen fiber in extracellular matrix of synaptic cleft.