Correct Option
The correct option is Sympathetic and parasympathetic divisions.
Explanation
The human neural system is broadly classified into the Central Neural System (CNS) and the Peripheral Neural System (PNS). The PNS is further categorized based on the type of organs it innervates: the somatic neural system (voluntary control) and the autonomic neural system (involuntary control).
Detailed Analysis
- Autonomic Neural System (ANS): This system transmits nerve impulses from the CNS to the involuntary organs and smooth muscles of the body. It is functionally subdivided into two main parts:
- Sympathetic Neural System: Generally prepares the body for stressful or emergency situations ("fight or flight").
- Parasympathetic Neural System: Generally conserves energy and promotes maintenance activities during rest ("rest and digest").
- Central and peripheral divisions is incorrect: The Central and Peripheral divisions represent the primary classification of the entire nervous system, not the subdivision of the autonomic system.
- Somatic and visceral divisions is incorrect: The Somatic and Visceral (Autonomic) divisions represent the classification of the Peripheral Neural System. The somatic system relays impulses to skeletal muscles, while the autonomic system targets smooth muscles and glands.
- Medullary and cortical divisions is incorrect: Medullary and cortical divisions typically refer to the anatomical structure of organs such as the kidney, adrenal glands, or specific regions of the brain, rather than the functional classification of the neural system.
Key Takeaway: The Autonomic Neural System (ANS) is a part of the Peripheral Neural System responsible for involuntary functions and is subdivided into the sympathetic and parasympathetic neural systems.