What is the functional unit of the nervous system?

What is the functional unit of the nervous system?

• A. Neuron
• B. Synapse
• C. Dendrite
• D. Nucleus

Answer: (A)

The functional unit of the nervous system is the neuron. Neurons are specialized to receive, process, and transmit information as electrical impulses and chemical signals. Their structure—with dendrites to receive input, the cell body to integrate it, and an axon to send signals to other cells—lets them perform the core signaling tasks. The synapse is the junction where communication between neurons occurs, not the unit itself. The nucleus inside the neuron contains the genetic material, but it’s the neuron as a whole that carries out signaling. Glial cells provide support, but the actual signaling work is done by neurons.

The functional unit of the nervous system is the neuron. Neurons are specialized to receive, process, and transmit information as electrical impulses and chemical signals. Their structure—with dendrites to receive input, the cell body to integrate it, and an axon to send signals to other cells—lets them perform the core signaling tasks. The synapse is the junction where communication between neurons occurs, not the unit itself. The nucleus inside the neuron contains the genetic material, but it’s the neuron as a whole that carries out signaling. Glial cells provide support, but the actual signaling work is done by neurons.