The place where the axon terminal from one nerve cell transfers an impulse to another nerve cell

The axon of one cell connects to another through a gap called the synapse. This gap is the space in which the leading neuron sends a neurotransmitter to the other neuron signalling that neuron to continue sending a signal.

This gel or liquid can be placed under the tongue of an unconscious person. this is important because you should never pour anything down the throat of an unconscious person-- s/he could choke.