Which of the following is NOT a factor in determining whether or not two EPSPs combine to reach threshold?
A) size of the EPSPs
B) timing between them
C) threshold of the postsynaptic cell
D) threshold of the presynaptic cell

Question

Quizplus · Accepted Answer

The threshold of the presynaptic cell does not affect whether or not two EPSPs combine to reach threshold. EPSPs (excitatory postsynaptic potentials) are generated by the release of neurotransmitters from presynaptic cells and the subsequent binding of those neurotransmitters to receptors on the postsynaptic cell. It is the postsynaptic cell's threshold that is important in determining whether or not EPSPs combine to reach threshold and initiate an action potential. The size and timing of the EPSPs are also factors that can affect whether or not they combine to reach threshold.

Which of the Following Is NOT a Factor in Determining