Nerve impulses are electrical signals that travel along the neurons, the specialized cells in the nervous system. These impulses are generated when a neuron is stimulated, causing a rapid change in electrical charge across its membrane. This process allows information to be transmitted quickly throughout the body. When a nerve impulse reaches the end of a neuron, it triggers the release of neurotransmitters, which are chemicals that cross the gap between neurons, known as the synapse. This communication between neurons is essential for various functions, including muscle movement, reflexes, and sensory perception.