Name: All About Balanced Diets
Uploaded: 2019-07-19
Duration: 44 s
Description: A balanced diet plays a vital role in the healthy growth of a body. In this video, we will learn about all the constituents of a balanced diet. Learn more.

Question

Figure shows the human digestive system.

Add each label to the appropriateness of the diagram. Some labels should be written in two places.

Labels to add

Physical digestion, increases the surface area of food (two places)
The gall bladder
Amylase is secreted (two places)
Amylase acts on starch (two places)
Lipase breaks down fats
Absorption happens
Secretes a liquid with a low pH, which kills bacteria
Protease is secreted (two places)

Accepted Answer

The purpose of digestion is to break down large insoluble molecules (carbs, proteins and lipids) into small soluble molecules that can be absorbed by the blood. Food is partially digested mechanically (by chewing, churning and emulsification) in order to break large pieces of food into smaller pieces of food which increases the surface area for enzymes to work on.

Mechanical digestion is the breakdown of food into smaller pieces without chemical change to the food molecules. It is mainly carried out by the chewing action of the teeth, the churning action of the stomach and the emulsification of fats by bile in the duodenum.

Physical digestion, increases the surface area of food in the mouth and small intestine.

The gall bladder-it is a small pouch that sits just under the liver. The gallbladder stores bile produced in the liver.

Amylase secreted in the mouth and duodenum.

Amylase acts on starch in the mouth and small intestine

Lipase breaks down fats in the small intestine.

Absorption happens in the small intestine.

In the stomach, secretes a liquid with a pH, which kills bacteria.

Protease is secreted in the stomach and duodenum.

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