Question

practice it
lo 5.1. what is the role of the mouth in digestion?
breaking down food mechanically through the process of chewing and producing saliva, which contains enzymes that begin the process of breaking down carbohydrates.
storing extra nutrients for later use
producing stomach acid to break down food
absorbing nutrients from the food
transporting food to the stomach

Explanation:

The mouth plays a dual role in digestion. Mechanically, chewing (mastication) breaks food into smaller pieces. Chemically, saliva (produced by salivary glands) contains enzymes like amylase that start carbohydrate breakdown. Storing nutrients is not a mouth function (liver and adipose tissue do that). Stomach acid is produced in the stomach. Nutrient absorption mainly occurs in the small intestine. Food is transported to the stomach via the esophagus (peristalsis), not a mouth role.

Answer:

Breaking down food mechanically through the process of chewing and producing saliva, which contains enzymes that begin the process of breaking down carbohydrates.