NEET PG DENTAL EXAM

HEAD NECK

PHARYNX LARYNX 47

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Where does digestion start?
A
stomach
B
mouth
C
esophagus
D
None of the above
Explanation: 

Detailed explanation-1: -Digestion begins in the mouth. The food is ground up by the teeth and moistened with saliva to make it easy to swallow. Saliva also has a special chemical, called an enzyme, which starts breaking down carbohydrates into sugars.

Detailed explanation-2: -Saliva contains an enzyme called ‘salivary amylase’ which starts the process of chemical digestion. It acts on starch and breaks it down to maltose. Chemical digestion i.e. the action of enzymes continue as food moves down the digestive tract.

Detailed explanation-3: -The mouth, or oral cavity, is the first part of the digestive tract. It is adapted to receive food by ingestion, break it into small particles by mastication, and mix it with saliva.

Detailed explanation-4: -An enzyme called salivary amylase is found in the saliva of our mouth which breaks down large molecules of carbohydrates into smaller ones. These are easily and quickly absorbed by the intestine when they reach there. Thus, when we chew the food properly, it is digested well.

There is 1 question to complete.