Final answer:
Unmyelinated nerve fibers are a component of the somatic nervous system, which is part of the peripheral nervous system and is responsible for conscious perception and voluntary responses.
Step-by-step explanation:
The unmyelinated nerve fibers are a component of the somatic nervous system, which is responsible for our conscious perception of the environment and voluntary responses through skeletal muscles. The somatic nervous system is part of the peripheral nervous system, which connects the central nervous system to the rest of the body. It transmits sensory information from the skin, muscles, and sensory organs to the CNS and sends motor commands from the CNS to the muscles.