Final answer:
False. Calcium channels open during synaptic transmission to allow Ca2+ ions to enter the cell.
Step-by-step explanation:
b. False. During synaptic transmission, voltage-gated Ca2+ channels open and allow Ca2+ ions to enter the cell. The influx of calcium ions causes synaptic vesicles to fuse with the membrane, releasing neurotransmitter molecules into the synaptic cleft. This neurotransmitter then binds to ligand-gated ion channels in the postsynaptic membrane, leading to a localized depolarization or hyperpolarization of the postsynaptic neuron.