With presynaptic inhibition:
A) An IPSP occurs on the postsynaptic cell.
B) All excitatory information being fed into the cell is prevented.
C) The release of excitatory transmitter from a specific presynaptic excitatory input is depressed.
D) More than one of these.
E) None of these.

Question

Quizplus · Accepted Answer

Presynaptic inhibition is the reduction of neurotransmitter release from the presynaptic neuron due to inhibition by another neuron. This means that the release of excitatory transmitter from a specific presynaptic excitatory input is depressed, which can result in a decrease in excitatory information reaching the postsynaptic cell. Option A is incorrect because IPSPs occur on the postsynaptic cell in postsynaptic inhibition. Option B is incorrect because presynaptic inhibition does not prevent all excitatory information from reaching the postsynaptic cell. Option D is incorrect because only one of the options is correct. Option E is incorrect because there is a correct option.

With Presynaptic Inhibition