What is the basic building block of the nervous system?

What is the basic building block of the nervous system?

• A. Nerves
• B. Neuron
• C. Synapse
• D. Myelin

Answer: (B)

Neurons are the basic building blocks of the nervous system because they are the cells specialized to handle information—receiving, processing, and transmitting signals. A neuron has a cell body with the nucleus, dendrites that gather input from other cells, and a long axon that carries electrical impulses to other neurons or muscles. The actual communication happens at the synapse, where neurotransmitters cross the gap to influence the next cell. Nerves are bundles of many neurons that form cables to carry signals through the body, but they’re not the unit itself. A synapse is the junction where a signal is passed from one neuron to another, not a cell. Myelin is the insulating coating around axons that speeds up signal transmission, a feature that enhances communication but isn’t the cell type itself.

Neurons are the basic building blocks of the nervous system because they are the cells specialized to handle information—receiving, processing, and transmitting signals. A neuron has a cell body with the nucleus, dendrites that gather input from other cells, and a long axon that carries electrical impulses to other neurons or muscles. The actual communication happens at the synapse, where neurotransmitters cross the gap to influence the next cell.

Nerves are bundles of many neurons that form cables to carry signals through the body, but they’re not the unit itself. A synapse is the junction where a signal is passed from one neuron to another, not a cell. Myelin is the insulating coating around axons that speeds up signal transmission, a feature that enhances communication but isn’t the cell type itself.