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16 Cards in this Set
- Front
- Back
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What are the cell bodies of neurons in the PNS that are clustered in masses called? |
Ganglia |
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What do the processes of neurogla do to neuronal cell bodies and most axons in the PNS? |
Completely insulate them from their surroundings |
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What are the two types of neuroglia? |
Satellite cells, Schwann cells |
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What surrounds the neuron cell bodies in ganglia? |
Satellite cells |
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What do satellite cells regulate? |
The environment around the neurons |
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What forms a thick, myelin sheath or indented fold of plasma membrane around peripheral axons? |
Schwann cells |
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What is another word for Schwann cells? |
Neurilemma cells |
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Whenever a Schwann cell covers an axon, what is the outer surface of the Schwann cell called? |
Neurilemma |
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What are most axons in the PNS, whether myelinated or unmyelinated shielded from by Schwann cells? |
Contact with interstitial fluid |
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How many segments of a single axon can a myelinating Schwann cell myelinate? |
One |
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What can enclose segments of several unmyelinated axons? |
Nonmyelinating Schwann cells |
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How much of the axon is a series of Schwann cells required to enclose? |
Along the entire length of the axon |
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Where does a Schwann cell first surround a portion of the axon? |
Within a grove of the axons cytoplasm |
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Once the Schwann cell surrounds the axon, what does it begin to do? |
Rotate around the axon |
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As the Schwann cell rotates, what is wound around the axon in multiple layers? |
Myelin |
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What does the myelin wound around the axon form? |
Tightly packed membrane |
