Sweet sensations are coupled to membrane receptors that activate gustducins, a second messenger system that closes potassium channels, causing depolarization and neurotransmitter release.
Les sensations sucrées sont couplées aux récepteurs membranaires qui activent les gustducines, un système de second messager qui ferme les canaux potassiques, provoquant une dépolarisation et la libération de neurotransmetteurs.
| Front | What chemical activates the sweet taste cells? |
|---|---|
| Back | 1. Sweet sensations are coupled to membrane receptors coupled to G proteins 2. G proteins called gustducins, in turn, trigger 2nd messenger systems 3. 2nd messengers close K+ channels preventing the efflux of K+ 4. This leads to depolarization and release of NT to trigger CN VII and IX, X |
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