Question

Which of the following is NOT a physical process of digestion?

• A. Mastication
• B. Churning
• C. Peristalsis
• D. Emulsification

Answer 1

The correct option is D Emulsification

(A) Mastication is the process of chewing food in the mouth.

(B) Churning is the process in which the stomach mixes its digestive enzyme with food.

(C) Peristalsis is a wave-like muscle contraction that helps in the movement of food through organs like the oesophagus.

(D) Emulsification is the process of mixing of bile with fat to change it into micelles. Emulsification is a chemical process.

So, the correct option is D.