Which of these is NOT an example of mechanical digestion?
A)the action of the teeth and tongue
B)the action of pepsin on protein
C)contractions of the small intestine
D)the churning of the stomach

Question

Quizplus · Accepted Answer

Mechanical digestion involves the physical breakdown of food into smaller pieces, while chemical digestion involves the breakdown of food molecules through chemical reactions with enzymes. Pepsin is an enzyme that is involved in chemical digestion, not mechanical digestion.

Which of These Is NOT an Example of Mechanical Digestion