2.
Which results in mechanical digestion in the stomach?
hydrochloric acid that kills bacteria in food
pepsin that breaks down protein into amino acids
waves of smooth muscle that push the food
contractions that mix and churn the food
Which results in mechanical digestion in the stomach?
hydrochloric acid that kills bacteria in food
pepsin that breaks down protein into amino acids
waves of smooth muscle that push the food
contractions that mix and churn the food