PHYSL212 Lecture Notes - Lecture 5: Neuromuscular Junction, Electrical Synapse, Vertebra

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Physl 212 - lecture #5 - experiments and concepts. Electrical and chemical synapses exist in the nervous. Bidirectional: presynaptic and postsynaptic influence each other: chemical synapse. *presence of vesicles in presynaptic terminals is a hallmark of chemical synapses. If a presynaptic terminal doesn"t have any vesicles, it. Spatial and temporal summation of epsps: spatial summation: many axons fire synchronously. Temporal summation: many spikes occur rapidly across time: epsp and ipsp can cancel each other out. If two action potentials are too close together, then spatial summation occurs: a presynaptic terminal can be either epsp or ipsp - it all depends on the receptor. End-plates: epsps decay in size (amplitude) over long distances, end plate: synapse between nerve and muscle. End plate potential: an epsp at the nmj. Synaptic transmission at the neuromuscular junction: miniature endplate potential (mepp): release of a very small amount of transmitter, contained in single vesicle.

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