Explain how an action potential is propagated across a synapse in a muscles (3 marks)

Any three of the following, in the correct order.
Action potential arrives at the pre-synaptic membrane Causes the voltage gated Ca2+ channels in the pre synaptic terminal to openCa2+ enters the pre synaptic terminal through the volt channels The influx of Ca2+ causes vesicles containing ACh (Acetylcholine) to be transported across the pre-synaptic terminal to the synaptic cleftThe vesicles release ACh which travels across the synaptic cleft and binds to the post-synaptic terminal Binding of ACh causes the Na+ channels on the post synaptic terminal to openNa+ enters the post synaptic cleft and depolarises the post-synaptic terminal causes a new action potential to be formed in the muscle providing the threshold potential of a new action potential is reached