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Neuronal cells on your taste buds initiate an action potential when they detect specific flavor molecules. Cell surface prote

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C.extracellularly ligand gated sodium channels.

EXPLANATION-

This is because taste buds present in our tongue consist of receptors that bind to food particles to find taste. Now each taste bud has neurons that signals brain for specific taste.

The action potentials in these neurons are produced by food particles like glucose which act as Ligands. These ligands binds to specific receptors like G- Protein coupled receptors.

As these ligand binds receptor extracellularly thus these proteins are called as extracellularly ligand gated Sodium ion channels.

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