As a result of calcium ions diffusing into the presynaptic cell,Multiple Choiceacetylcholine is actively transported to the postsynaptic neuron.synaptic vessels migrate to the plasma membrane and release acetylcholine.sodium ions diffuse into the cell.acetylcholine is actively transported from the presynaptic neuron.ligand-gated sodium channels open.

An action potential arriving at the presynaptic terminal causesMultiple Choicevoltage-gated sodium ion channels to open, and sodium ions to diffuse out of the cell.voltage-gated calcium ion channels to open, and calcium ions to diffuse into the cell.voltage-gated sodium ion channels to open, and sodium ions to diffuse into the cell.ligand-gated sodium channels to open, and sodium ions to diffuse out of the cell.acetylcholine to diffuse into the cell.

What effect does acetylcholine have on the postsynaptic neuron?Multiple ChoiceTerminal vessels migrate to the plasma membrane.Ligand-gated sodium ion channels open and sodium diffuses in.Voltage-gated sodium ion channels open and sodium diffuses in.Ligand-gated calcium ion channels open and calcium diffuses in.Voltage-gated calcium ion channels open and calcium diffuses in.

Action potentials arriving at a presynaptic terminal causeMultiple Choicerelease of neurotransmitter.calcium ion channels to close.calcium ion channels to open.breakdown of acetylcholine.

Chemical synapses in the nervous system a- allow diffusion of chemical substances form the presynaptic neuron into the postsynaptic neuronb- allow transmission of potential changes in one direction only; from the presynaptic to the postsynaptic neuronsc- have potential-gated ionic channelsd- are more numerous in the peripheral nervous system than the central nervous system

Movement of Na+ ions into a nerve cell during the upstroke of an action potential is an example of of the following transport mechanismSelect one:a. Facilitated diffusionb. Co-transportc. Primary active transportd. Simple diffusion