Answer:
The more acidic the food is, the more depolarization of the sensory receptor occurs.
Step-by-step explanation:
While eating citrus fruits like lemons, the sensory receptors become increasingly depolarized the more acidic the meal is, giving it a basic sour flavor.
Acidity is a characteristic of citrus fruits. Fruits have a sour flavor because of vacuoles, compartments inside plant cells that are acidic due to the infusion of positively charged hydrogen ions (basically, protons).