Perception of sour tastes depends upon _________. A)a compound interacting with a G protein coupled receptor on the receptor cell surface B)sodium ions in the food that enter H⁺ ion channels in the taste receptor plasma membrane, leading to a membrane depolarization C)protons in the food that enter cation channels in the taste receptor plasma membrane, leading to a membrane depolarization D)potassium ions in the food that enter cation channels in the taste receptor plasma membrane, leading to a membrane depolarization E)protons in the food that enter cation channels in the taste receptor plasma membrane, leading to a membrane hyperpolarization

Question

Quizplus · Accepted Answer

Sour tastes are detected by the presence of protons in the food that enter cation channels in the taste receptor plasma membrane, leading to a membrane depolarization. This depolarization triggers an action potential in the taste receptor cell, which signals to the brain that the taste is sour.

Perception of Sour Tastes Depends Upon _________