Biology / Bio 0779 · Atom · ~20 seconds
Ion Channel-Linked Receptors
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An ion channel-linked receptor opens a membrane channel when its ligand binds, letting specific ions flow through down their concentration gradient.
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A ligand binding a gated channel triggers a conformational change that lets sodium or calcium ions pass through until the ligand releases.
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The channel stays closed by default — it opens only while the ligand remains bound, not permanently once triggered.