Question

epsps and ipsps both have amplitudes that are proportional to the intensity of the signals that elicit them. that means, both are what kind of responses?
differential responses
opposite responses
graded responses
all - or - none responses

Explanation:

Graded responses have amplitudes proportional to the intensity of the eliciting signals. EPSPs (excitatory - postsynaptic potentials) and IPSPs (inhibitory - postsynaptic potentials) fit this description as their amplitudes vary with the strength of the incoming signals. Differential responses refer to differences in response to different stimuli, opposite responses just indicate opposing effects, and all - or - none responses have a fixed amplitude once a threshold is reached.

Answer:

C. graded responses