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1. Which one of the following increases the rate at which nutrients are absorbed?

A. Peristalsis

B. Chewing

C. villi and micro-villi


2. Which one of the following would increase the rate at which food is digested?

A. Peristalsis

B. Chewing

C. villi and micro-villi


3. Food moves along the digestive tract through a process called  

A. Osmosis

B. Peristalsis

C. Digestion


4. Chemical breakdown of food starts in the

A. Stomach with the action of amylase

B. Mouth with the action of chewing

C. Intestine with the action of pepsin

D. Mouth with the action of amylase


5. Fats start to be chemically digested in the?

A. Stomach

B. Duodenum

C. Mouth


6. Microvilli are structures that

A. Increase the chemical breakdown of food

B. Increase the surface area of food to be absorbed

C. Facilitated peristalsis


7. Digestion of carbohydrates, such as starch, commences in the

A. Stomach

B. Duodenum

C. Mouth

D. Large intestine


8. The main role of the large intestine is to

A. Absorb fat into the body

B. Breakdown of proteins through enzyme action

C. absorb water and salt

D. Absorb amino acids and mono-saccharides.


9. Bile is produced by the liver and stored in the gall bladder. It is released into the duodenum and serves to

A. Breakdown carbohydrates

B. Breakdown proteins

C. emulsify fats

D. Chemically breakdown fat into fatty acids

 10. Amylase is responsible for the breakdown of

A. Proteins

B. Carbohydrates

C. Lipids


11. Label the Diagram


12.  What is digestion?



13. How different are intracellular and extra-cellular digestion?


14. Concerning extracellular digestion what is meant by chemical digestion?


15. Give 2 examples of intrcellular digestion?


16. Explain the difference between chemical and physical digestion and where they occur in the body?



17. What are peristaltic movements? What is their role in human digestion?



18. What is the location of the salivary glands in humans?


19. How is the HCI neutralised in the small intestine?


20. What is the purpose of Saliva and what is in it?


21. Why doesn't the food enter the trachea instead of going to the oesophagus?


22. Place these in-order from 1 to 9. 1 being where food starts and 9 being where it ends.


23. What is the purpose of hydrochloric acid?


24. What is the digestive enzyme that acts within the stomach? Which type of food does it digest? What are the cells that produce that enzyme?


25. Which are the three parts of the small intestine?


26. What is the substance produced in the liver that acts in the small intestine during digestion? How does that substance act in the digestive process?



27. What are 3 enzymes found in the digestive system and state what molecule they breakdown.



28. Where is the majority of the nutrients absorbed


29. Simple sugars and amino acids are absorbed into the _____________ where as lipids are absorbed into the ___________ .



30. What is the purpose of bacteria in the gut and why are they important?

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