The nervous system plays a crucial role in allowing us to interact with our environment, both internal and external—and to think great thoughts! The nervous system has two divisions: the central nervous system and the peripheral nervous system. The nervous system performs three major functions: sensory, integrative, and motor. There are two types of cells in the nervous system: the neuroglia and the neurons. The neuron is responsible for the rapid communication of electrical signals. The three parts of the neuron are the dendrites, cell body, and axon. The nodes of Ranvier are well-spaced unmyelinated areas along the axon. Explain the process of how a neuron sends electrical signals to other neurons.
