Gated ion channels respond to which of the following stimuli?Multiple select question.Mechanical stimulusLigands binding to receptorsVoltage changesThey are always open.Temperature changes
Question
Gated ion channels respond to which of the following stimuli?Multiple select question.Mechanical stimulusLigands binding to receptorsVoltage changesThey are always open.Temperature changes
Solution
Gated ion channels respond to:
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Mechanical stimulus: These are known as mechanically-gated ion channels. They open or close in response to mechanical force applied to the cell membrane.
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Ligands binding to receptors: These are known as ligand-gated ion channels. They open or close in response to specific molecules (ligands) binding to the channel or a separate receptor.
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Voltage changes: These are known as voltage-gated ion channels. They open or close in response to changes in the electrical potential across the cell membrane.
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Temperature changes: These are known as thermally-gated ion channels. They open or close in response to changes in temperature.
The option "They are always open" is incorrect because the defining characteristic of gated ion channels is that they can open or close in response to specific stimuli.
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