Question

Molecules are broken down into smaller pieces by the churning of muscles in the stomach. which of the following is this an example of?

a. mechanical digestion
b. chemical digestion
c. enzymatic digestion
d. peristalsis

Answer 1

The churning of muscles in the stomach is an example of mechanical digestion.

Step-by-step explanation:

The churning of muscles in the stomach is an example of mechanical digestion.

Mechanical digestion is the physical breakdown of food into smaller pieces without changing the chemical nature of the food. It helps to increase the surface area and mobility of the food.

Examples of mechanical digestion include chewing, tongue movements, and the churning of food in the stomach.