Chemical Synapse
A synapse, chemical signals called neurotransmitters cross these gaps, carrying on the signal.
Chemical diffusion
exocytosis
chemical synapse
Chemical
The answer is NEUROTRANSMITTER.
They act as an active "bridge".
Chemical synapses are specialized junctions through which neurons signal to each other and to non-neuronal cells such as those in muscles or glands. At a chemical synapse, one neuron releases a neurotransmitter into a small space (the synapse) that is adjacent to another neuron.
a chemical that transmits a nervous systems signal across a synapse.
synapse
By a chemical released by an axon.