How can neurotransmitters be excitatory or inhibitory?

Answer 1

Excitatory neurotransmitters function when something needs to be stimulated, and inhibitory neurotransmitters are crucial when something needs to be depressed.

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Answer 2

Kai Adams

Neurotransmitters can be excitatory by promoting the generation of action potentials, typically through depolarization. Inhibitory neurotransmitters hyperpolarize the postsynaptic membrane, making it less likely for an action potential to occur. The effect depends on the receptors they bind to and the resulting changes in ion channel permeability.

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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.