Multiple Choice
Which of the following structures is visible in the midsagittal view of the sheep brain?
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12. The Central Nervous System
Introduction to the Central Nervous System
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Which structures comprise the central nervous system (CNS)?
A
Cranial nerves and spinal nerves
B
Spinal cord and spinal nerves
C
Brain and cranial nerves
D
Brain and spinal cord
Verified step by step guidance1
Step 1: Understand the definition of the central nervous system (CNS). The CNS consists of the main control centers of the nervous system responsible for processing and integrating information.
Step 2: Identify the primary structures of the CNS. These are the brain and the spinal cord, which together coordinate sensory information and motor commands.
Step 3: Differentiate the CNS from the peripheral nervous system (PNS). The PNS includes cranial nerves and spinal nerves that connect the CNS to limbs and organs.
Step 4: Recognize that cranial nerves and spinal nerves are part of the PNS, not the CNS, even though they are closely associated with the brain and spinal cord.
Step 5: Conclude that the correct structures comprising the CNS are the brain and spinal cord, as they form the central processing units of the nervous system.
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