Identify the three types of nerve fibers described.

• A. Sensory, Interneuron/Connecting, Motor
• B. Nerve endings, Axons, Dendrites
• C. Myelin, Neurilemma, Peripheral
• D. Muscle Tissue, Nerve Tissue, Connective Tissue

Answer: (A)

Classification of nerve fibers by function involves three main types: sensory, interneuron (connecting), and motor. Sensory fibers carry information from sensory receptors toward the central nervous system, signaling things like touch, temperature, pain, or proprioception. Motor fibers transmit commands from the central nervous system to muscles or glands, producing movement or secretion. Interneurons, or association neurons, reside mainly in the brain and spinal cord and link sensory pathways to motor pathways, helping process information and coordinate responses.

Other terms describe parts or structures rather than these functional categories: nerve endings, axons, and dendrites are components of neurons; myelin, neurilemma, and peripheral refer to myelin-related or location-related terms; and muscle tissue, nerve tissue, and connective tissue are tissue types, not nerve-fiber classifications.