A synapse is a small gap between two neurons, which are the cells in the nervous system that transmit signals. When a neuron sends a signal, it releases chemicals called neurotransmitters into the synapse. These neurotransmitters then bind to receptors on the neighboring neuron, allowing the signal to continue its journey. There are two main types of synapses: chemical synapses and electrical synapses. Chemical synapses use neurotransmitters to communicate, while electrical synapses allow direct electrical connections between neurons. Synapses play a crucial role in how the brain processes information and enables communication throughout the body.