Complete the description about the role of summation in postsynaptic cells. Match the terms in the left column to the appropriate blanks in the sentences on the right. Not all terms will be used. Reset Help non-additive Postsynaptic potentials are . If a postsynaptic cell receives multiple EPSPs in a short less period, it be depolarized to the threshold potential and fire an action potential. IPSPs promote the effect of EPSPs, making the postsynaptic cell likely to fire an action potential. counteract additive may may not more