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Questions and Answers
Central Nervous System The central nervous system (CNS) consists of the brain and ______
spinal cord
The brain is the part of the CNS that is located in the ______
skull
The peripheral nervous system (PNS) consists of all nervous tissue outside the ______
CNS
Twelve pairs of cranial nerves emerge from the ______
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Thirty-one pairs of spinal nerves emerge from the ______
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Central Nervous System The central nervous system (CNS) consists of the brain and spinal cord (Figure 1). The brain is the part of the CNS that is located in the ______ and contains about 85 billion neurons. The spinal cord is connected to the brain through the foramen magnum of the occipital bone and is encircled by the bones of the vertebral column. The spinal cord contains about 100 million neurons. The CNS processes many different kinds of incoming sensory information. It is also the source of thoughts, emotions, and memories. Most signals that stimulate muscles to contract and glands to secrete originate in the CNS.
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The spinal cord is connected to the brain through the foramen magnum of the occipital bone and is encircled by the bones of the vertebral column. The spinal cord contains about 100 million ______.
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The CNS processes many different kinds of incoming sensory information. It is also the source of thoughts, emotions, and ______.
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Thirty-one pairs of spinal nerves emerge from the spinal ______.
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The peripheral nervous system (PNS) (pe-RIF-e-ral) consists of all nervous tissue outside the ______.
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