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Is the function of acetylcholine in the central nervous system to transmit impulses between neurons, prevent an action potential from occurring, slow down the transmission of nerve impulses, or to maintain a resting potential?

Answer 1

Acetylcholine is a neurotransmitter that primarily acts on receptors at the neuromuscular junction (NMJ) in skeletal and cardiovascular muscle (parasympathetic innervation).

Since an action potential is a result of a VGNaC opening and typically has little to do with neurotransmitters, it wouldn't stop one from happening.

Since maintaining a resting potential is the job of numerous ion pumps and channels surrounding the neuronal membrane, it wouldn't be able to do so.

Since the rate of action potentials is dependent on numerous other biochemical processes that I won't go into here, it wouldn't directly lower the rate of action potentials.

Neurotransmitters are released as a function of synaptic fusion via #Ca^(2+)# influx near the active zone of the presynaptic neuron. Acetylcholine would bind to various receptors (either inhibitory or excitatory) on the postsynaptic neuron's dendrites to create either EPSP's or initiate biochemical mechanisms namely starting with G-proteins.

Hence, the answer is probably #"A"# (although it is in crude language).

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Answer 2

Aaron Allen

The function of acetylcholine in the central nervous system is to transmit impulses between neurons.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.