Reading 11

Digestion is the process by which food is digested into smaller particles or molecules, for use in the human body.
Digestion starts in the mouth and stomach, but most takes place in the small intestine. In these parts, the food is mixed with substances called enzymes, which speed up chemical reactions of the food.

The fats, proteins, and carbohydrates (starches and sugars) in the foods are made up of very complex molecules and must be digested, or broken down. When digestion is completed, starches and complex sugars are broken down into simple sugars, fats are digested to fatty acids and glycerin, and proteins are digested to amino acids. Simple sugars, fatty acids, and glycerin, and amino acids are digested foods which can be absorbed into the blood stream. Other foods such as vitamins, minerals, and water do not need digestion.

The rest of the food passes into the large intestine. Water is taken back into the body. The remains, or faeces, go to the rectum.

1. The text is about ….
A. how foods are absorbed
B. how foods are digested
C. how enzymes break down foods
D. how blood absorbs the digested food
E. how the water is taken back into the body
2. According to paragraph 3, which of the following is NOT absorbed into the blood?
A. Glycerin.
B. Minerals.
C. Fatty acids.
D. Amino acids.
E. Simple sugars.
3. It is NOT stated in the text that ….
A. not all foods are digested
B. digestion starts in the small intestine
C. the first digestion begins in the mouth
D. foods are digested to be absorbed into the blood
E. enzymes speed up chemical reactions of the food.
4. The purpose of the text is to inform the reader ….
A. the process of digestion
B. how the foods are broken
C. why vitamins are not digested
D. why the foods are broken down
E. the process of absorbing the food
5. 'Digestion starts …, but most takes place in the small intestine.' (Paragraph 2)
The underlined words can be replaced by ….

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