# 1pilihanWhat happens during depolarization in an axon?Na+ ions leave the axonK+ ions enter the axonNa+ ions enter the axonK+ ions leave the axon
# 2pilihanHow is a nerve impulse transmitted across a synapse?MechanicallyElectricallyChemicallyOptically
# 3pilihanWhat is the role of the sodium-potassium pump in maintaining resting potential?Pumps 3 Na+ out and 2 K+ inPumps 2 Na+ out and 3 K+ inPumps 3 K+ out and 2 Na+ inPumps 2 K+ out and 3 Na+ in
# 4pilihanWhat happens during the depolarization phase of an action potential?K+ channels openNa+ channels closeNa+ channels openAction potential peaks