Question

It’s Friday night, Peter and his friends decide to go out for pizza following a football game.Which of the following is an example of mechanical digestion?

A. saliva in the mouth digesting the pizza crust
B. bile emulsifying the fats from the cheese in the small intestine
C. gastric juices in the stomach digesting the pepperoni
D. using the teeth to chew a slice of pizza into small pieces

Answer 1

D. Bc mechanical digestion starts in the mouth where food is chewed.

Answer 2

D. Using the teeth to chew a slice of pizza into small pieces.
Mechanical digestion is breaking up food using non-chemical means