Visceral Nervous System Structure — NEET Biology

Correct answer: B — S2, S4 and S6 are correct

The core concept tested is the definition, components, and function of the Visceral Nervous System (VNS) as described in NCERT. S1. The VNS is a distinct subdivision of the Central Nervous System (CNS) that processes internal sensory information. This statement is incorrect. The VNS is a part of the *Peripheral Nervous System*, not the CNS. S2. It comprises a complex network of nerves, fibres, ganglia, and plexuses. This statement is correct. This is a direct quote from the NCERT definition of the visceral nervous system. S3. Impulses travel exclusively from the viscera to the Central Nervous System via the VNS. This statement is incorrect. Impulses travel *to and from* the viscera to the CNS via the VNS, meaning it has both afferent and efferent components. S4. The VNS is responsible for transmitting regulatory impulses from the CNS to the viscera. This statement is correct. This is the efferent component of the visceral nervous system. S5. The VNS functions under voluntary control, allowing conscious regulation of visceral activities. This statement is incorrect. The VNS, like the autonomic nervous system, functions under *involuntary* control, regulating activities of internal organs without conscious effort. S6. Myelinated nerve fibres are rarely found in the VNS, which primarily consists of unmyelinated fibres. This statement is correct, as unmyelinated nerve fibres are commonly found in the autonomous and somatic neural systems, and the visceral system is closely associated with the autonomic system. Therefore, statements S2, S4 and S6 are correct. The correct option is B because it accurately identifies the correct statements. Options A, C, and D are incorrect as they include false statements (S1, S3, S5) or omit correct ones. Recap: The visceral nervous system is a part of the PNS, comprising nerves, fibres, ganglia, and plexuses that transmit impulses both to and from the viscera, functioning involuntarily, and commonly features unmyelinated nerve fibres.