OSMT (Ontario Society of Medical Technologists) Practice Exam

Which parts are included in the peripheral nervous system?

1. The spinal nerves

2. Sensory receptors

3. Afferent nerves

4. All of the above

The correct answer is: All of the above

The peripheral nervous system (PNS) encompasses all the nerves that lie outside the central nervous system (CNS), which includes the brain and spinal cord. This means it comprises various components that facilitate communication between the CNS and the rest of the body. The spinal nerves, which emerge from the spinal cord, are crucial components of the PNS, as they carry signals to and from the limbs and trunk. Sensory receptors are another key aspect of the PNS because they detect stimuli from the environment and relay information to the CNS for processing. Afferent nerves are also part of the PNS, transmitting sensory information from the body back to the CNS. Given that all these elements—spinal nerves, sensory receptors, and afferent nerves—are integral parts of the peripheral nervous system, the answer indicating that all of the mentioned components are included is indeed correct. The comprehensive nature of the PNS illustrates its vital role in connecting the CNS with peripheral structures, thus supporting the argument for choosing the complete option of all these parts.