試題詳解

43. Given the steps shown below, which of the following is the correct sequence for transmission at a chemical synapse? 1. Neurotransmitter binds with receptors associated with the postsynaptic membrane. 2. Ca^2＋ions rush into neuron's cytoplasm. 3. Action potential depolarizes the synaptic terminal membrane. 4. Ligand-gated ion channels open. 5.∠ Synaptic vesicles release neurotransmitter into the synaptic cleft.
(A) 1,2,3,4,5
(B) 2,3,5,4,l
(C) 3,2,5,1,4
(D) 4,3,1,2,5
(E) 5,1,2,4,3