Term
What is a Neuron?
(For this set I suggest that you look at the diagram) |
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Definition
(Every other card in this set is parts of a neuron)
Basic unit of the nervous system that conducts electrical impulses. Communicates with other neurons, organs, and muscles |
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Term
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Definition
| Part of the neuron that receive information from other cells. |
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Term
| What is a cell body(soma)? |
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Definition
| Transmits info. from the dendrite. |
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Term
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Definition
| A long extension containing cytoplasm that conducts electrical impulses. |
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Term
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Definition
| At the end of the axon this releases neurotransmitter that continue impulses to another neuron. |
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Term
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Definition
| Insulation around the axon that speeds up an electrical impulse. |
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Term
| What is a Node of Ranvie? |
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Definition
| Gaps between the Myelin Sheath. Impulses travel from node to node. |
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Term
| What is Resting Potential? |
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Definition
| When it is not conducting electrical impulses. Inside cell is negative 70mV. Pumps out Na+ (gated channels are closed)K+ gated channels are open. |
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Term
| What is Action Potential? |
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Definition
| Stimulus causes a positive charge in the membrane potential of the axon. Na+ channels are open, K+ channels are closed. Na+ floods into the axon and swings to +40mV |
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Term
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Definition
| Na+ gates are closed stopping the flood. K+ gates are open allowing K+ out of the cell. Na+/K+ pump re-established. |
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