The quantal nature of chemical synaptic transmission is best supported by observation of: A)Spontaneous miniature end plate potentials (mEPPs). B)Discrete jumps in end plate potential (EPP)amplitude when [Ca⁺⁺] is normal. C)EPPs that vary smoothly in amplitude. D)A constant EPP amplitude. E)Evoked EPPs that are smaller than mEPPs.

Question

Quizplus · Accepted Answer

Spontaneous miniature end plate potentials (mEPPs) are small, brief depolarizations that can be observed in post-synaptic cells even in the absence of stimulation. These events are thought to result from the release of individual quanta of neurotransmitter, indicating the quantal nature of synaptic transmission. B, C, D, and E are not supported by observations of synaptic transmission.

The Quantal Nature of Chemical Synaptic Transmission Is Best Supported