CH3.4 Organizing digestion

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 3

What is the difference between mechanical and chemical digestion?

muscular motion caused by circular muscles in the digestive tract to transport food

acidic digestive juice made by the stomach to break down proteins and to kill bacteria. It contains water, enzymes and gastric acid.

splitting up fat molecules by adding bile

finger-like structures at the inner lining of the small intestine

peristalsis

gastric juice

emulsification

villi

What is the end product matching the enzyme called 'protease'?

1. Amino acids
2. Protein
3. Fatty acids
4. Nutrients

Why are there no enzymes that break down water, vitamins and minerals?

Fibre is not digested by your body. Ellen and Karim discuss why this is so. Ellen says that fibre is small enough to enter your bloodstream. Karim says that fibre is unused material and it is just eliminated. Who is right?

1. Ellen
2. Karim
3. Both
4. Neither

What is peristalsis?

Which of the following processes does not take place in the small intestine?

1. Ingestion
2. Chemical digestion
3. Mechenical digestion
4. Absorption

Which of the following digestive juices kills bacteria in the stomach?

1. Bile
2. Gastric acid
3. Pancreatic juice
4. Gastric juice

salivary glands

pancreas

small intestine

duodenum

large intestine

esophagus

liver

stomach

ACTIVITY.

ROUND 1 (15 min). Each table will get assigned a text. Read the text, answer the matching questions on the A3 paper (you will not be able to answer all questions) and prepare to explain what was described in the text to your classmates. 

ROUND 2 (30 min). The groups are mixed. Each group should have at least one expert on each text. The expert explains what was described in their text to the group members. In the meantime, you try to answer the remaining questions. 

YOU CANNOT READ THE TEXT OUT LOUD OR LITERALLY ANSWER THE QUESTIONS FOR YOUR CLASS MATES !!!

1. Page 76 & 77 – mouth & peristalsis
   
2. Page 77 & 78 – stomach
   
3. Page 79 – duodenum
   
4. Page 80 & 81 – small & large intestine
   

DISCUSS THE TABLE ON 3.4