What are gustducins?
A) Gustducins are gustatory sensory neurons that transmit the gustatory signals.
B) Gustducins are taste buds.
C) Gustducins are ion-gated channels on the gustatory receptor cell that respond to sodium ions from salt solutions or hydrogen ions from acidic or sour solutions to induce depolarization in the cell.
D) Gustducins are G protein complexes that use second messengers to produce the depolarization in the cell from sweet, bitter, and umami sensations.
E) Gustducins are epithelial projections on the surface and sides of the tongue that may contain taste buds.
Answer: D
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