describe the process of digestion of carbohydrates in alimentary canal in humans of class 10
Answers
Answer:
What are the steps to digestion for carbohydrates?
Carbohydrate digestion begins in the mouth with the mechanical action of chewing and the chemical action of salivary amylase. Carbohydrates are not chemically broken down in the stomach, but rather in the small intestine.
How is carbohydrates digested in our bodies explain?
Digestion of carbohydrates begins in your mouth. ... If they are fully digested, they are broken down to their basic units of glucose, fructose and galactose. These simple sugars then must pass through the lining of the small intestine into the blood stream, where they are carried off to serve as fuel for your body.
TWO ANSWERS THERE.
Answer:
Digestion: The goal of carbohydrate digestion is to break down all disaccharides and complexcarbohydrates into monosaccharides for absorption, although not all are completely absorbed in the small intestine (e.g., fiber). Digestion begins in the mouth with salivary amylase released during the process of chewing.
OR
The digestion of carbohydrates starts in the mouth and completes in the small intestine region of the alimentary canal. The enzymes that act on carbohydrates are collectively known as carbohydrases.
Digestion in the mouth:-
As food enters the mouth, it gets mixed with saliva.
Saliva – secreted by the
salivary glands – contains a digestive enzyme called salivary amylase; also called as Ptyalin. This enzyme breaks down starch into sugar at pH 6.8.
salivary
amylase
Starch---------->Maltose + Isomaltose +
ph.6.8
Limit dextrins
Salivary amylase continues to act in the oesophagus, but its action stops in the stomach as the contents become acidic. Hence, carbohydrate-digestion stops in the stomach.Digestion in the small intestine:Carbohydrate-digestion is resumed in the small intestine. Here, the food gets mixed with the pancreatic juice and the intestinal juice. Pancreatic juice contains the pancreatic amylase that hydrolyses the polysaccharides into disaccharides.
amylase
Starch --------->Disaccharides
(Polysaccharides)
Similarly, the intestinal juice contains a variety of enzymes (disaccharidases such as maltase, lactase, sucrase, etc.). These disaccharidases help in the digestion of disaccharides. The digestion of carbohydrates is completed in the small intestine.
maltose
Maltose-------->2Glucose
Lactose
Lactose---------->Glucose + Galactose
Sucrose
Sucrose -------------> Glucose + Fructose