When chemically (ligand) gated channels open and allow negatively charged ions (e.g., chloride, Cl^-) to enter a neuron in the dendrites or cell body, the consequence is

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When negatively charged ions enter a neuron, the neuron's membrane potential becomes more negative (hyperpolarized), making it harder for the neuron to reach the threshold for generating an action potential. Therefore, the neuron's excitability decreases.

When Chemically (Ligand) Gated Channels Open and Allow Negatively Charged