Question

At what stage of Neural transmission do Neurotransmitters bind to neurotransmitter-gated ion channels?

Answer 1

The stage of neural transmission when neurotransmitters bind to neurotransmitter-gated ion channels is at the end of the transmitting neuron or the synapse opening between it and the receiving neuron.

Explanation:

The human body contains specialized cells called neurons which have the unique capability of transmitting messages to and from the brain, and from cell to cell.
Neurons are described here:
https://www.verywell.com/what-is-a-neuron-2794890

When a message is to be sent to or from a specific area of the body, it travels the length of the neuron to the other end at which point a synapse is reached. The synapse is a tiny gap between adjacent neurons.
Synapses are described here:
https://www.verywell.com/what-is-a-synapse-2795867

This is the stage where the electrical signal in the neuron is converted to a chemical signal and neurotransmitters bind to transmitter-gated ion channels. This complicated procedure results in the release of chemical information between the transmitting neuron and the receiving neuron.
There is extensive information on the chemical transfer here:
http://www.interactivephysiology.com/login/digestdemo/misc/assignmentfiles/nervousII/Ion_Channels.pdf