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34 Cards in this Set
- Front
- Back
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Nerve tissues job is to |
Control |
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Anatomical division: |
Central nervous system (CNS) Peripheral nervous system (PNS) |
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Central nervous system example: |
Brain & spinal chord |
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Peripheral nervous system example: |
Everything else out of the CNS connects CNS to organs, muscles |
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Functional division: |
Autonomic nervous system Somatic nervous system |
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Autonomic nervous system examples: |
Digestion Heartbeat |
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Autonomic nervous system is voluntary or involuntary? |
Involuntary |
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Somatic nervous system examples: |
Movement Sensory |
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Somatic nervous system is involuntary or voluntary? |
Voluntary |
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All nerve tissues consist of ____ |
Various cells and cell processes |
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Stains for nervous system fall into what 3 groups? |
1. Neurons (nerve cells) 2. Neuroglia (supporting network) 3. Myelin (insulating layer for axon) |
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Neurons consist of |
Cell body Primarily euchromatin Nissl substance |
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Define chromatolysis |
Loss of nissl substance |
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Name the parts of the neuron |
Node of ranvier Myelin sheath Schwann cell nucleus Nissl substance Dendrites Nucleus Nucleolus |
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Axons are also known as |
Nerve fibers |
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What is the function of axons |
Sends impulse to other neuron or organ (output) |
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What are the functions for dendrites? |
Input for the neuron No myelin |
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Neurons should be stained with what method? |
Silver methods |
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What makes up gray matter? |
Nerve cell bodies and dendrites (no myelin) |
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What makes up white matter? |
Extended axons Myelinated |
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Neuroglia is made up of: (4) |
Microglia Astrocytes Oligodendrocytes Ependymal Cells |
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What makes up gray matter? |
Nerve cell bodies and dendrites (no myelin) |
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What makes up white matter? |
Extended axons Myelinated |
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Neuroglia is made up of: (4) |
Microglia Astrocytes Oligodendrocytes Ependymal Cells |
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What are the components of microglia? |
Phagocytes thought the CNS stains are rarely used |
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What are the components of astrocytes? |
Provide support for nerve tracts, nutrient exchange with blood and CSF Scar formation following injury Protoplasmic (gray matter) Fibrous (white matter) Cajal stain |
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What are the components of Oligodenrocytes |
Produce and maintain the myelin sheath in CNS rarely stained in routine lab |
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What are the components of Ependymal Cells |
Epithelium lining ventricles and spinal canal Barrier between CSF and nervous tissue |
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Neuroglia diagram |
Back (Definition) |
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What is the purpose for myelin? |
Insulating layers for axons |
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Where is myelin found? |
White matter |
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Myelin in CNS is made up of |
Oligodendrocytes |
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Myelin in PNS is made up by |
Schwann Cells |
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Myelin diagram |
Back (Definition) |
