Answer :

Ions enter cells via cell membrane ion channels that are either gated or nongated.

Voltage-gated and ligand-gated ion channels react to voltage differences and ligand binding, respectively. Voltage-gated ion channels are ion-selective, while ligand-gated ion channels are not.

Voltage-gated ion channels open in reaction to a voltage differential, while ligand-gated channels open in response to ligand binding.

Voltage-gated ion channels enable just one kind of ion to pass through the channel pore, while ligand-gated channels are less selective and allow two or more types of ions to pass through the channel pore.

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