Question

EPSPs are at least 10 mV in magnitude at the point of synaptic communication ____.

a) True
b) False

Answer 1

EPSPs are not always 10 mV in magnitude at the point of synaptic communication.

Step-by-step explanation:

The statement is False. EPSPs (excitatory postsynaptic potentials) are not always at least 10 mV in magnitude at the point of synaptic communication. EPSPs can vary in magnitude depending on the strength of the incoming signal from the presynaptic neuron.

In order for the summation of postsynaptic potentials to result in an action potential being generated, the net change in membrane potential needs to reach the threshold of excitation. This threshold is typically around -55 mV, meaning that the membrane potential needs to depolarize by at least 10-15 mV to trigger an action potential.

Therefore, EPSPs do not have to be at least 10 mV in magnitude for an action potential to be generated.