An excitatory post-synaptic potential

safaTerkawi

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2022-08-09

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An excitatory post-synaptic potential.

. Is the depolarization of a post-synaptic nerve cell membrane that occurs when a presynaptic neurone is stimulated.
Involves reversal of polarity across the post-synaptic nerve cell membrane.
May be recorded from a posterior root ganglion cell.
Is propagated at the same rate as an action potential.
Is caused by the electrical field induced by activity in the pre-synaptic nerve terminals.

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safaTerkawi

2022-08-09

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A. True An inhibitory potential is a hyperpolarization.

B. False It is a transient (about 5 msec), small (about 5 mV) depolarization towards the threshold for firing.

C. False It may be recorded from a motor neurone.

D. False It is not propagated.

E. False It is caused by transmitters changing permeability in post-synaptic membranes

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