Multiple Choice
In human anatomy, the central nervous system (CNS) consists of which structures?
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12. The Central Nervous System
Introduction to the Central Nervous System
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In an introductory study of the nervous system, what are the two main divisions of the nervous system?
A
Somatic nervous system and autonomic nervous system
B
Central nervous system (CNS) and peripheral nervous system (PNS)
C
Afferent (sensory) division and efferent (motor) division
D
Sympathetic division and parasympathetic division
Verified step by step guidance1
Step 1: Understand that the nervous system is broadly divided based on its anatomical and functional organization.
Step 2: Recognize that the two main anatomical divisions are the Central Nervous System (CNS), which includes the brain and spinal cord, and the Peripheral Nervous System (PNS), which includes all the nerves outside the CNS.
Step 3: Note that other divisions mentioned, such as the somatic and autonomic nervous systems, or sympathetic and parasympathetic divisions, are subdivisions of the PNS, not the two main overall divisions.
Step 4: Recall that the afferent (sensory) and efferent (motor) divisions describe the functional flow of information within the PNS, rather than the primary anatomical divisions.
Step 5: Conclude that the correct answer to the question about the two main divisions of the nervous system is the Central Nervous System (CNS) and the Peripheral Nervous System (PNS).
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