Term
General features
Cell Body |
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Definition
- Integration and metabolic center of a neuron
- 10-100 microns in diameter
- Large amounts of Nissl substance
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Term
General features
Dendrites |
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Definition
- 100-200 microns in diameter
- Recieve information
- Multiple dendrites can arise from one cell body
- Exist at apical or basal side of cell bodies
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Term
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Definition
- Start out wide but tapers distal to the cell bodies
- Vary in length but can be as long as 1 meter (i.e. sciatic nerve)
- Carry information away from the axon
- One axon arises per cell can branch multiple times
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Term
General features
Nissl substance (rER) |
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Definition
- Collection of endoplasmic reticulum and ribosomes
- Produce essential neuronal secretory proteins
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Term
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Definition
- One axon and one dendrite with the cell body in between
- Examples include neurons of retina, olfactory and vestibulococchlea (hearing)
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Term
Neuronal types
Pseudounipolar |
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Definition
- Only axons
- Information-->peripheral axon-->cell body-->axon
- Cell body lies within dorsal root ganglion
- During development they start out as bipolar cells
- Innervate skin, muscles and joints
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Term
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Definition
| - most abundant neuron type - one axon and several dendrites |
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Term
| Neuron doctrine (Ramon Cajal) |
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Definition
| - Neurons work differently than other cell types - Neurons are independent entity - Reticular doctrine preceded this theory |
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Term
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Definition
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