When a neuron sends a message it releases the neurotransmitter serotonin, which is detected by the next neuron receiving the message. (sciencedaily.com)
It is due to these proteins that the information arriving at a synapse can be transmitted and then received by the next neuron. (sciencedaily.com)
Neurons sense a signal through branching dendrites, carry this signal to the cell body, and send it onwards through a long axon to signal the next neuron. (sciencedaily.com)