Question

The limiting factor in the synthesis of acetylcholine is the?

1) speed at which acetyl groups are formed
2) speed at which vesicles are formed
3) frequency of the action potentials produced
4) speed at which choline is recycled
5) speed at which vesicles release choline

Answer 1

The limiting factor in the synthesis of acetylcholine is the speed at which choline is recycled. This process is important for maintaining proper functioning of neuronal transmission.

Step-by-step explanation:

The limiting factor in the synthesis of acetylcholine is the speed at which choline is recycled. ACh is broken down by the enzyme acetylcholinesterase (AChE) into acetyl and choline. AChE resides in the synaptic cleft, breaking down ACh so that it does not remain bound to ACh receptors. This recycling process is important for maintaining proper functioning of neuronal transmission.