Term
| How were endplate potentials discovered? |
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Definition
| recording electrode was put into muscle cell of frog NMJ & stimulated the nerve to fire an action potential |
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Term
| How were miniature endplate potentials discovered? |
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Definition
| kept recording from the muscle cell but without stimulating the axon |
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Term
| toxins that block ACh receptors --> ? |
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Definition
| block both EPPs & mEPPs --> death |
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Term
| toxins that block acetylcholinesterase --> ? |
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Definition
| bigger EPPs & mEPPs because ACh isn't getting broken down in the synapse |
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Term
| Upon direct application of ACh to the muscle fiber, response varied depending on ______ |
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Definition
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Term
| Reducing calcium levels ______ the size of the EPPs & mEPPs |
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Definition
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Term
| 2 results of small increases in calcium |
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Definition
1. frequency of mEPPs increases
2. size of EPPs increases |
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Term
| 3 factors that go into the response a muscle cell gives from a stimulus |
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Definition
1. n = number of vesicles ready to be released
2. p = probability of vesicle release
3. q = size of a single quantum |
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Term
| equation for magnitude of EPPs |
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Definition
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