3A: Synapses are the means by which neurons, just like other cells of the body, communicate with each other as well as other cells, like muscles and glands. They are the equivalent of neural telephone lines allowing for the transmission of a neurotransmitter, that is, the message. Thus, you are able to tell a dog from a cat. and a ball from a rock. Without all this cross-talk, you might look at an object without truly seeing or hear a sound without actually listening.