Download human digestive system

HUMAN DIGESTIVE SYSTEM
Student Name ______________________________
1.
1. What is peristalsis? ____________________________________________________
2. The hepatic portal vein carries blood from the alimentary canal to the ____________________
3. What are the products of fat digestion? __________________________
4. State a role of beneficial bacteria in the alimentary canal__________________________
5. State two good sources of protein in the human diet. __________________________
6. State two ways in which villi are adapted for the absorption of soluble foods.
______________________________________________________________________________
7. Name a process by which soluble foods are absorbed into the blood from the small intestine.
____________________________________________________
8. What type of food is mainly absorbed into the lacteal? __________________________
9. What are the final products of the digestion of a protein? __________________________
10. What is meant by egestion? ____________________________________________________
11. Bile is secreted by the __________________________
12. State one reason why a low pH is important in the stomach __________________________
13. Where is the epiglottis? __________________________
What is it’s function? ____________________________________________________
14. (a) Name a carbohydrate-digesting enzyme in the human alimentary canal._____________________
(b) Where in the alimentary canal does this enzyme act? __________________________
(c) State the enzyme’s product(s). ____________________________________________________
15. State a role that the liver plays in the digestive process. __________________________
16. Write the dental formula for an adult human. ____________________________________________
17. Give one function of symbiotic bacteria in the human digestive system. _______________________
______________________________________________________________________________
18. Where in the digestive system are the products of digestion absorbed? ________________________
State one way in which this part of the system is adapted for absorption. _______________________
19. In which part of the digestive system is water absorbed? __________________________
Give another function of this part of the digestive system. __________________________
20. An organ for churning of food to chyme is the __________________________
21. Waves of contractions passing along the gut is __________________________
22. What type of teeth grind food into smaller pieces? __________________________
23. Distinguish between mechanical and chemical digestion. __________________________
______________________________________________________________________________
24. Name a structure in the human digestive system, other than teeth, which is involved in mechanical digestion
__________________________
25. Bile is involved in digestion in the human body.
(a) Where is bile produced? __________________________
(b) Where is bile stored? __________________________
(c) Where does bile act in the alimentary canal? __________________________
26. State a benefit of dietary fibre ____________________________________________________
2. (a) What are the four main types of teeth? ___________________________________________________
(b) What causes tooth decay? ___________________________________________________________
(c) Suggest two ways you can protect your teeth from decay. _________________________________
________________________________________________________________________________
(d) The bacteria that form plaque respire anaerobically. What does anaerobic mean?
__________________________________________________________________
How do these bacteria bring about tooth decay? (Hint: What happens when bacteria respire
anaerobically?) __________________________________________________________________
3. Look at the diagram of the digestive system.
(a) Name the parts labelled A to J.
A = ________________________________
B = ________________________________
C = ________________________________
D = ________________________________
E = ________________________________
F = ________________________________
G = ________________________________
H = ________________________________
I = ________________________________
J = ________________________________
(b) Match the labels on the diagram to these functions:
(i) Absorbs a lot of water __________
(ii) Contains acid. __________
(iii) Stores faeces before release. __________
(iv) Makes bile. __________
(v) Stores bile. __________
(vi) Joins the throat and stomach. __________
(vii) Most absorption takes place here. __________
(viii) Has no function in humans. __________
(ix) Faeces pass out here. __________
(x) Makes pancreatic juice. __________
4. Match each of the parts of the body in the left-hand column with its function in the right-hand column.
Mouth
Colon
Pancreas
Liver
Small intestine
Stomach
Pepsin works here
Makes urea
Most food is absorbed here
Food is chewed here
Makes enzymes and insulin
Useful bacteria live here