Which cells form the brain's communication network?

• A. Neurons
• B. Neurodevelopment
• C. Cerebellum
• D. Limbic system

Answer: (A)

Neurons are the cells that form the brain's communication network. They are specialized for signaling, using electrical impulses called action potentials to travel along their axons and releasing neurotransmitters at synapses to influence other neurons. Dendrites receive input, the soma integrates it, and the axon can branch to connect with many targets, creating complex networks that underlie every thought, sensation, and movement. Glial cells provide crucial support—insulating, nourishing, and cleaning up—but they do not serve as the primary signaling units themselves. Structures like the cerebellum and limbic system are important brain regions, not the cells that compose the communication network.