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.

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.

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

In response to an action potential, voltage-gated calcium channels Blank______ in the presynaptic cell's axon terminal.Multiple choice question.closeopen

Increased calcium ion permeability of the presynaptic terminal cell membrane is caused by an ______________.Multiple Choiceacetylcholinesodium ionsaction potentialincreased concentration of calcium ions

Place the steps of the muscle action potential in the appropriate order.Rank the options below.An action potential arrives at the presynaptic terminal.An action potential arrives at the presynaptic terminal. open choices for rankingCalcium ions enter the presynaptic terminal.Calcium ions enter the presynaptic terminal. open choices for rankingACh binds to and opens ligand-gated Na+ channels on the postsynaptic membrane.ACh binds to and opens ligand-gated Na+ channels on the postsynaptic membrane. open choices for rankingVoltage-gated Ca2+ channels in the presynaptic membrane open.Voltage-gated Ca2+ channels in the presynaptic membrane open. open choices for rankingNa+ enters the postsynaptic cell.Na+ enters the postsynaptic cell. open choices for rankingThe enzyme acetylcholinesterase removes acetylcholine from the synaptic cleft.The enzyme acetylcholinesterase removes acetylcholine from the synaptic cleft. open choices for rankingThe neurotransmitter acetylcholine (ACh) is released from pre-synaptic vesicles.The neurotransmitter acetylcholine (ACh) is released from pre-synaptic vesicles. open choices for rankingACh unbinds from the ligand-gated Na+ channels, which then close.ACh unbinds from the ligand-gated Na+ channels, which then close. open choices for rankingPostsynaptic membrane begins to depolarize.Postsynaptic membrane begins to depolarize. open choices for rankingACh is released and diffuses into the synaptic cleft.ACh is released and diffuses into the synaptic cleft. open choices for rankingIf depolarization passes threshold, an action potential is generated along the postsynaptic membrane.If depolarization passes threshold, an action potential is generated along the postsynaptic membrane. open choices for ranking