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11 Cards in this Set
- Front
- Back
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What comprises the central nervous system?
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The brain and the spinal cord.
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Which part of the spinal cord do the motor neurons come out of?
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The dorsal side.
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Which part of the spinal cord do the sensory neurons go into?
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The ventral side.
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What are glia?
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The non-neuron part of the CNS, which are now known to be important in processing and such.
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What does grey matter consist of?
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Neurons, glia, and synapses.
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What does white matter consist of?
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Nerve fibers (axons) and glia.
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What do dendrites do?
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Receive the signal from other neural cells and transmit it to the cell body.
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What does the axon hillock do?
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Connects the axon to the cell body.
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What do Schwann cells do?
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They compose the myelin sheath, which insulates the axon.
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What do the Nodes of Ranvier do?
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They expose the axon to the extracellular fluid periodically. The signal "jumps" between these nodes.
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Which ion are cells more permeable to, sodium or potassium? What effect does this have on membrane potential?
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Potassium. It makes the membrane potential negative as potassium can leak out more than sodium can leak in.
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