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14 Cards in this Set
- Front
- Back
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Name the features of the neuron used for communication.
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Axon
Terminal Boutons Dendrites |
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What is the function of the Axon?
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Carrying information to other neurons.
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What is the function of Terminal Boutons and Dendrites?
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Terminal Boutons are on the end of Axons, and communicate information to the Dendrites or cellbody of another neuron.
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Define Resting Potential.
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the action potential of a neuron at rest: -70mv
More positive charges outside the cell than inside |
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Describe the action potential process.
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1. resting potential moves "down" to threshold(-50mv)
2. Na+ flows into axon until inside more + than outside 3. K+ move out of axon 4. Na+ ions flow into axon until +40 5. Na+ moved outside 6. Potential Dif drops to zero then reaches slightly higher than resting 7. once inside becomes neg. K+ ions move back into cell until -70mv restored. |
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Where does the action potential begin? What is its name?
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Axon Hillock-where the axon joins the cell body.
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What is the function of the myelin sheath?
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Increase speed at which action potential is conducted down the axon.
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Define Salatory Conduction.
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The process by which action potential jumps from one node (gap in myelin) to the next.
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What is the All-or-none law of nerve conduction?
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Either we get FULL action potential, or none.
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What is the synapse?
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The area at the end of the terminal boutons which connects one neuron to the next.
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What does the synapse include?
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Presynaptic Membrane
Synaptic Cleft Post-synaptic Neuron |
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What is the Presynaptic Membrane?
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The membrane of the terminal bouton belonging to the neuron generating the action potential(the presynaptic neuron)
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What is the Synaptic Cleft?
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a very small gap between the terminal bouton and the dendrites or cell body of a postsynaptic neuron
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What is a Post-Synaptic Neuron?
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the neuron that will be affected by the action potential of the presynaptic neuron.
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