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12 Cards in this Set
- Front
- Back
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99% of all neurons are found where?
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Gray and White matter of the CNS
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What is the function of nervous tissue?
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Communication
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What two functions are neurons especially adapted for?
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1. Electrical excitability or irritability
2. Conductivity or propigation |
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What are the two components of nervous tissue?
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ECM (not much though)
Cells |
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What are the two type of cells in nervous tissue?
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Neurons (resident)
Neuroglial cells support and protect neurons, and maintain homeostasis (glial cells in PNS=SC |
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When neurons generate action potentials in excitable striated muscle fibers, what is the typical vaule?
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-90mV
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What is the general structure of a neuron?
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Cell Body (nut, or soma)
Processes (axons & dendrites) Synapses (cell to cell jx) |
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What are the 3 types of neurons?
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Sensory Afferent
Motor Efferent Interneurons |
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Decribe sensory afferent neurons and what type of axon they have.
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Sensory afferent neurons carry information from the receptors (skin, viscera, spcial senses or bld vessels) to the CNS. They are found as bi and unipolar neurons.
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Decribe motor efferent neurons and what type of axon they have.
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Motor Efferent neurons carry information from the CNS to the muscle, glad or another neuron, and are all multipolar neurons.
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Embryonically speaking, where is the CNS from?
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Neural tube ectoderm
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Embryonically speaking, where is the PNS from?
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Neural crest ectoderm
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