In an introduction to the peripheral nervous system (PNS), what is its main function?

• A. Coordinate endocrine hormone release directly into the bloodstream
• B. Produce cerebrospinal fluid and regulate its circulation through the ventricles
• C. Transmit sensory information to the central nervous system and carry motor commands from the central nervous system to effectors (muscles and glands)
• D. Integrate and interpret sensory input to generate conscious perception and memory

Answer: (C)

Verified step by step guidance

1. Understand that the peripheral nervous system (PNS) is composed of all the nerves outside the brain and spinal cord, connecting the central nervous system (CNS) to the rest of the body.
2. Recognize that the PNS has two main roles: transmitting sensory information from sensory receptors to the CNS, and carrying motor commands from the CNS to muscles and glands (effectors).
3. Differentiate the PNS function from other systems: it does not coordinate endocrine hormone release (that's the endocrine system), nor does it produce cerebrospinal fluid (that's the role of the CNS structures like the choroid plexus).
4. Note that integrating and interpreting sensory input to generate perception and memory is primarily a function of the CNS, especially the brain, not the PNS.
5. Conclude that the main function of the PNS is to serve as a communication relay by transmitting sensory information to the CNS and carrying motor commands from the CNS to effectors.