Which of the following is an example of mechanical digestion in the GI tract?

Question

Quizplus · Accepted Answer

Chewing food up into smaller pieces in the mouth is an example of mechanical digestion because it physically breaks down the food into smaller pieces, increasing its surface area for chemical digestion to occur. Salivary amylase breaking down starch in the mouth is an example of chemical digestion. Pancreatic lipase breaking down fat in the small intestine and gastrin stimulating HCl production in the stomach are examples of chemical processes, not mechanical ones.

Which of the Following Is an Example of Mechanical Digestion