NEET BIOLOGY

Detailed explanation-1: -Chemical digestion takes place throughout your digestive tract. Chemical digestion begins in your mouth with your saliva. The process continues in your stomach and is completed in your small intestine. The majority of chemical digestion takes place in your small intestine.

Detailed explanation-2: -Chemical digestion breaks down different nutrients, such as proteins, carbohydrates, and fats, into even smaller parts: Fats break down into fatty acids and monoglycerides. Nucleic acids break down into nucleotides. Polysaccharides, or carbohydrate sugars, break down into monosaccharides.

Detailed explanation-3: -Most chemical changes in digestion occur in the small intestine. Large molecules of food are broken down into smaller molecules that can be absorbed by our cells. Carbohydrates, proteins, and fats are broken down in different parts of the digestive system using different kinds of enzymes.

Detailed explanation-4: -Most mechanical and some chemical digestion occur in the stomach. Mechanical digestion occurs as layers of muscle in the stomach lining contract to produce a mixing and churning motion. Chemical digestion is carried out by stomach juices that contain enzymes and hydrochloric acid.

Detailed explanation-5: -Digestion of food is an example of a physical change.