55. Which of following statements concerning the mechanism of long-term potentiation (LTP) in the vertebrate brain isINCORRECT?
(A) LTP involves an increase in the strength of synaptic transmission that occurs when presynaptic neurons produce a brief,high-frequency series of action potentials.
(B) The presynaptic neuron release acetylcholine (ACh). ACh binds to its receptor, opening the receptor cham1el anddepolarizing the postsynaptic membrane.
(C) Ca2+ diffuses into the postsynaptic neuron. Ca2+ initiates the phosphorylation of the receptor, making them moreresponsive.
(D) ci+ stimulates the postsynaptic neuron to produce NO.
(E) NO diffuses into the presynaptic neuron, causing it to release more neurotransmitters.