A whitish bundle of fibers that transmits impulses to the brain or spinal cord is known as what?

The correct response identifies a nerve as a whitish bundle of fibers that transmits impulses to the brain or spinal cord. Nerves are composed of numerous individual nerve fibers (axons) that are grouped together, encapsulated by a protective layer. This structure allows them to efficiently conduct electrical signals, carrying sensory information from various parts of the body to the central nervous system and delivering motor commands back to tissues like muscles.

Understanding the anatomy of the nervous system is key, as nerves play a primary role in overall body function and communication. While neurons are the fundamental cells that generate and transmit nerve impulses, they are not classified as bundles of fibers.

Synapses refer to the junctions between neurons where chemical signals are transmitted but do not consist of fiber bundles. Axons, on the other hand, represent the long, slender projections of individual neurons that conduct impulses away from the neuron's cell body; they are components of the nerve but do not account for the arrangement seen in a nerve cable itself. Thus, the response indicating that a nerve is the correct term for a bundle of fibers is accurate and highlights the essential role of nerves in the nervous system.