Which nerve fiber type transmits impulses from sense organs toward the spinal cord and brain?

Which nerve fiber type transmits impulses from sense organs toward the spinal cord and brain?

• A. Motor
• B. Interneuron/Connecting
• C. Sensory
• D. Peripheral Nerves

Answer: (C)

Signals from sense organs toward the spinal cord and brain are carried by sensory (afferent) nerve fibers. These neurons start with receptors in the senses and transmit information to the CNS, such as touch, temperature, and pain. Motor fibers carry impulses in the opposite direction, from the CNS to muscles. Interneurons reside in the CNS and connect other neurons to process information. Peripheral nerves are bundles that contain many fibers, including both sensory and motor, so they aren’t a single fiber type. Therefore, the fiber type that transmits from sense organs toward the CNS is sensory.

Signals from sense organs toward the spinal cord and brain are carried by sensory (afferent) nerve fibers. These neurons start with receptors in the senses and transmit information to the CNS, such as touch, temperature, and pain. Motor fibers carry impulses in the opposite direction, from the CNS to muscles. Interneurons reside in the CNS and connect other neurons to process information. Peripheral nerves are bundles that contain many fibers, including both sensory and motor, so they aren’t a single fiber type. Therefore, the fiber type that transmits from sense organs toward the CNS is sensory.