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Cards In This Set
| Front | Back |
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What are outgoing signals on neurons called?
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Action Potentials / Nerve impulses
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On what part of the neuron are action potentials cnducted?
In which direction do they go? |
Axon - towards target cell
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What are the junctions between neurons called?
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Synapses
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Insulating materials that some axons are covered with
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Myelin
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Support cells in the peripheral nervous system which produce myelin
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Schwann cells
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Process of formation of myelin sheath
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Myelination
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What is the myelin sheath made of in the PNS?
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Schwann cells
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What controls movement of ions across membrane of neuron
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Ion channels
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Four properties of ion channels
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1. selective
2. gated / non gated 3. regionally located 4. functionally unique |
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What are ion channels made up of?
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Proteins containing watery pores
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3 factors that determine selectivity of an ion channel
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1. charge of ion
2. size 3. how much water the ion attracts/ holds around it |
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Is resting neuronal cell membrane more positive inside or outside?
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Outside
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What is result of the charge separation in a resting neuronal membrane
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Membrane potential
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When neuronal membrane is at rest, are the voltage gated channels open or closed?
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Closed
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What happens to the voltage-gated channels when there is a nerve impulse in the neuronal membrane?
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Open & close
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