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17 Cards in this Set
- Front
- Back
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What is the main function of the Nervous System? |
Main function is to maintain Homeostasis. |
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What does the Central Nervous System consist of? |
It consists of the brain and spinal cord |
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What does the Peripheral Nervous System (PNS) consist of? |
Consists of the Autonomic Nerves & Somatic Nerves |
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Describe the Somatic Nerves of the (PNS) |
Somatic nerves are voluntairly controlled and consist of sensory and motor neurons. |
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Describe the Sympathetic Nerves Of the Autonomic Nerves in the (PNS) |
These are the involuntarily controlled "stressed" nerves, consisting of sensory and motor neurons. |
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Describe the Parasympathetic Nerves of the autonomic nerves in the PNS |
These are the involuntarily controlled "normal" nerves, consisting of sensory and motor neurons. |
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Sensory Neuron |
Take impulses from the body receptors to the CNS. Sensory neurons are Unipolar |
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Interneuron |
Are actually IN the CNS (brain and spinal cord) Interneurons are Bipolar |
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Motor Neuron |
Take impulses away from the CNS and to the muscles and glands. Motor neurons are Multipolar |
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Cell Body |
Houses the nucleus and cytoplasm |
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Dendrites |
Receive information |
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Axon |
Transmit implies away from the cell body |
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Myelin Sheath |
A white fatty covering that insulates the axon. Schwann cells produce the myelin sheath. Myelin Sheaths serve as protection to axons and slow for faster conduction of impulse and greater power of regeneration. |
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Schwann Cells |
A special kind of glial cell that produces a myelin sheath that wraps around the axons as insulation |
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Nodes of Ranvier |
Gaps between Schwann Cells of the axon |
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Grey Matter & It's Location |
Grey Matter is Non-Myelinated neurons in the brain |
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White Matter & It's Location |
White Matter is known as Myelinated Neurons in the brain |
