Answer:
The correct answer is option- chemical signals, synapse, neurotransmitters.
Explanation:
Communication between neurons through the specialized sites or contact called synapses. The most common synapse is chemical synapse that takes place between the terminal axon of one neuron and dendrite of other where axon send messages and dendrite receives the message. This message is through a chemical known as a neurotransmitter that following an action potential which inhibits or excite the target neuron during this communication.
Thus, the correct answer is option - chemical signals, synapse, neurotransmitters.