Q:

An inhibitory post-synaptic potential

safaTerkawi
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2022-08-10
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 An inhibitory post-synaptic potential.

  1. May be recorded in a post-ganglionic sympathetic neurone.
  2. May be recorded in an anterior horn motor neurone.
  3. Does not exceed one millivolt in amplitude.
  4. Moves membrane potential towards the equilibrium potential for potassium.
  5. May summate in space and time with other excitatory and inhibitory potentials in the same neurone.
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safaTerkawi
2022-08-10
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A. False No such potentials have been recorded here.

B. True The hyperpolarization of the anterior horn cell reduces the likelihood of the cell firing action potentials by moving the membrane potential further from the firing threshold.

C. False Its amplitude is about 5 mV and its duration about 5 msec.

D. True It may be produced by increased permeability to potassium or to chloride ions.

E. True In this way the post-synaptic cell integrates the various signals it receives.

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