Define excitatory postsynaptic potential (EPSP)and inhibitory postsynaptic potential (IPSP). A)An excitatory postsynaptic potential is a graded hyperpolarization by the postsynaptic cell and an inhibitory postsynaptic potential is a graded repolarization by the postsynaptic cell. B)An excitatory postsynaptic potential is a graded repolarization by the postsynaptic cell and an inhibitory postsynaptic potential is a graded hyperpolarization by the postsynaptic cell. C)An excitatory postsynaptic potential is a graded hyperpolarization by the postsynaptic cell and an inhibitory postsynaptic potential is a graded depolarization by the postsynaptic cell. D)An excitatory postsynaptic potential is a graded depolarization by the postsynaptic cell and an inhibitory postsynaptic potential is a graded hyperpolarization by the postsynaptic cell. E)An excitatory postsynaptic potential is a graded depolarization by the postsynaptic cell and an inhibitory postsynaptic potential is a graded repolarization by the postsynaptic cell.

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Quizplus · Accepted Answer

An excitatory postsynaptic potential (EPSP) is a graded depolarization by the postsynaptic cell and an inhibitory postsynaptic potential (IPSP) is a graded hyperpolarization by the postsynaptic cell. EPSPs result from the binding of neurotransmitters to ionotropic receptors, causing the influx of positive ions such as Na+ and Ca2+, thus depolarizing the membrane potential. Conversely, IPSPs result from the binding of neurotransmitters to inhibitory receptors, causing the influx of negative ions such as Cl− and K+, thus hyperpolarizing the membrane potential.

Define excitatory Postsynaptic Potential (EPSP)and Inhibitory Postsynaptic Potential (IPSP)