The Peripheral Nervous System comprises which components?

The Peripheral Nervous System comprises which components?

• A. Spinal branches and cranial nerves
• B. Brain and spinal cord
• C. Enteric nervous system
• D. Brainstem and cerebellum

Answer: (A)

The Peripheral Nervous System includes all nerves outside the brain and spinal cord, connecting the central nervous system to the rest of the body. The major components are the cranial nerves, which emerge from the brain, and the spinal nerves, which branch from the spinal cord. This is exactly what the option describing spinal branches and cranial nerves conveys, making it the best fit. The brain and spinal cord belong to the Central Nervous System, so they aren’t part of the PNS. The enteric nervous system is a subdivision of the autonomic nervous system within the PNS, but listing only it doesn’t capture the primary components typically emphasized. The brainstem and cerebellum are CNS structures.

The Peripheral Nervous System includes all nerves outside the brain and spinal cord, connecting the central nervous system to the rest of the body. The major components are the cranial nerves, which emerge from the brain, and the spinal nerves, which branch from the spinal cord. This is exactly what the option describing spinal branches and cranial nerves conveys, making it the best fit. The brain and spinal cord belong to the Central Nervous System, so they aren’t part of the PNS. The enteric nervous system is a subdivision of the autonomic nervous system within the PNS, but listing only it doesn’t capture the primary components typically emphasized. The brainstem and cerebellum are CNS structures.