Neural System: CNS vs PNS Structure — NEET Biology
📚 Practice ConceptThe human neural system is divided into two parts: (i) the central neural system (CNS) (ii) the peripheral neural system (PNS) The CNS includes the brain and the spinal cord and is the site of information processing and control. The PNS comprises of all the nerves of the body associated with the CNS (brain and spinal cord). The nerve fibres of the PNS are of two types: (a) afferent fibres (b) efferent fibres The afferent nerve fibres transmit impulses from tissues/organs to the CNS and the efferent fibres transmit regulatory impulses from the CNS to the concerned peripheral tissues/organs.
Which of the following statements about the major divisions of the human neural system are NOT correct? S1. The Central Neural System (CNS) includes the brain and the spinal cord, serving as the site for information processing. S2. The Peripheral Neural System (PNS) is composed of the brain and all cranial nerves extending to the periphery. S3. All nerve fibres of the PNS are classified as either afferent or efferent. S4. Myelinated nerve fibres are primarily found within the spinal and cranial nerves, ensuring rapid impulse conduction. S5. Unipolar neurons, characterized by a cell body with one axon only, are commonly found in the cerebral cortex of the brain. S6. The autonomic neural system is a subdivision of the CNS that regulates involuntary organs. Choose the option with only the NOT correct statements:
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