A synapse is a small gap between two neurons, where communication occurs. When a neuron sends a signal, it releases chemicals called neurotransmitters into this gap. These neurotransmitters travel across the synapse and bind to receptors on the receiving neuron, allowing the signal to continue. Synapses play a crucial role in the nervous system, enabling the transmission of information throughout the body. They are essential for various functions, including memory, learning, and muscle movement. The strength and efficiency of synapses can change over time, a process known as synaptic plasticity, which is important for adapting to new experiences.