Human Digestive System - Science Learning 5

Learn Human Digestive System questions with answers. This prep guide includes questions like, after digestion in stomach where does food move?, what happens in small intestine?, why are villi essential?, how is starch processed?, how are proteins digested? and others below.

Human Digestive System Learning 5

Question: After digestion in stomach where does food move?

Answer: After the processing of food in the stomach, the food reaches the small intestine at a rate of 2.5cm per minute. The small intestine is a long tube approximately 7 metres long and 3cm in diameter.

Question: What happens in small intestine?

Answer: In small intestine, bile is added from the liver which emulsifies fats. Three different types of enzymes are further added by pancreas to enhance the rate of work. The walls of the small intestine are covered by small finger-like projections known as 'Villi'. Food is absorbed by the support of Villi.

Question: Why are Villi essential?

Answer: The Villi in the small intestine are perfect for absorbing food because they provide the small intestine with a much larger surface area. They have a thin outer layer of cells and a dense network of blood capillaries.

Question: How is starch processed?

Answer: First of all, in mouth, starch is converted into maltose by the enzymes known as Amylase. Afterwards within the small intestine, maltose is converted into glucose by the aid of enzymes known as Maltases.

Question: How are proteins digested?

Answer: At first, an enzyme known as Proteases acts on large protein molecules and convert them into polypeptides. Polypeptides move to small intestine, as they move into small intestine pancreas secrete an enzyme known as Trypsin. Trypsin converts polypeptides into amino acids. These amino acids are absorbed into blood stream and transported to their destination.