Diffusion, degradation, and re-uptake all describe the mechanisms of Blank______.Multiple choice question.sodium and potassium movementreleasing neurotransmitters from presynaptic terminalspropagation of action potentialsremoving neurotransmitters from the synaptic cleft

When traveling along an axon, the cell membrane immediately ahead of an action potential depolarizes because of _________blank.Multiple Choicethe sodium/potassium pumpmembrane receptorsdiffusion of sodium currentdecreased membrane permeabilitypotassium efflux

Each presynaptic terminal contains _________blank, which contain the neurotransmitter _________blank that, when released, cause ligand-gated Na+ channels to open in the motor end-plate. This causes _________blank in the muscle cell.Multiple Choicesynaptic vesicles; acetylcholine; depolarizationproteins; acetylcholine; repolarizationmitochondria; acetylcholinesterase; depolarizationACh receptors; acetylcholinesterase; repolarization

Sodium ions move into a neuron during Blank______.Multiple choice question.repolarizationdepolarization

Within a chemical synapse, the receptors Blank______.Multiple choice question.are only responsive to changes in voltageare always degraded by enzymes in order disable thembind to a variety of different ligandsbind to very specific ligands

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