In Neural Integration, _______ to Determine an Appropriate Response

Question

In neural integration, _______ to determine an appropriate response.
A) EPSPs and IPSPs are summed
B) neurotransmitters activate sodium-potassium pumps
C) endorphins activate synapses
D) the all-or-none response regulates transmission

Accepted Answer

EPSPs (excitatory postsynaptic potentials) and IPSPs (inhibitory postsynaptic potentials) are summed to determine whether a neuron will fire an action potential or not. EPSPs and IPSPs are graded potentials that can either depolarize (EPSP) or hyperpolarize (IPSP) the neuron. When the sum of the graded potentials reaches a threshold, an action potential is initiated.