Ms. Isenor
Name:_____________________________
Biology 12 Digestion Workbook
DIGESTION -WORKBOOK
1.
What is digestion?
2.
What is the difference between digestion and absorption?
3.
Compare the composition of the food we eat with the molecules that our cells
actually use.
4.
How many teeth do adults have? What are the four types of teeth and their
function?
5.
What is a hydrolytic enzyme? What is the enzyme in saliva? What reaction
does it catalyze?
6.
Using a labeled diagram, explain why when you swallow food or liquid, it
doesn't usually go up your nose and down your windpipe.
1
Ms. Isenor
Name:_____________________________
Biology 12 Digestion Workbook
7.
Describe the process of peristalsis in the esophagus. How can a combination of
circular and longitudinal muscles cause this action?
8.
What are the functions of the stomach?
9.
What is gastric juice? Where is it produced? What is it composed of? What
does it do?
10. Give a one sentence description, using your own words, of the function of the
following digestive components:
Name
Function
1. mouth
2. pharynx
3. epiglottis
4. cardiac sphinctor
5. esophagus
6. pepsinogen
11. How come, if your stomach is full of acid and protein-digesting enzymes, doesn't it
digest itself?
2
Ms. Isenor
Name:_____________________________
Biology 12 Digestion Workbook
12. a) Majority of digestion takes place in this organ:
b) Structure of this organ:
b) Length of this organ:
c) Three parts of this organ are called:
13. a) Length of the duodenum:
b) What controls flow of material into the duodenum?
c) What is this material that enters the duodenum called?
d) What is main role of duodenum in digestion?
e) What two organs produce secretions that end up in duodenum?
14. a) Liver produces what substance?
b) Where is this substance stored?
15. What does bile do?
16. a) What compound does pancreatic juice contain?
b) What does this substance do?
c) What 3 important enzymes does pancreatic juice contain (name and function)?
3
Ms. Isenor
Name:_____________________________
Biology 12 Digestion Workbook
17. a) What produces the intestinal juices in the small intestine?
b) Where are these glands located?
c) Two important intestinal juice enzymes and their functions are (name and
function):
18. a) Draw a villus, and show the blood and lymph vessels within.
19. a) Where does absorption take place?
b) Where do sugars and amino acids go?
c) Where do glycerol and fatty acids go?
4
Ms. Isenor
Name:_____________________________
Biology 12 Digestion Workbook
20. List 6 functions of the liver
21. Explain how the large intestine is structurally and functionally different from the
small intestine.
22. What are the three main types of hormones regulating the digestive process?
What do the do?
23. Trace the path of the blood from the small intestine to the heart.
5
Ms. Isenor
Name:_____________________________
Biology 12 Digestion Workbook
Using the diagram above explain the following:
24) What does your body do when it senses a high blood sugar level?
25) What does your body do when it senses a low blood sugar level?
6
Ms. Isenor
Name:_____________________________
Biology 12 Digestion Workbook
DIGESTO-MAN
Draw and label all the digestive parts and enzymes
Parts
Duodenum
Ileum
Rectum
Teeth
Pharynx
Mouth
Esophagus
Pancreas
Cardiac Sphincter
Large Intestine
Jejunum
Liver
Stomach
Pyloric Sphincter
Small Intestine
Gall Bladder
Chemicals
Trypsin
Pepsin
Pancreatic Amylase
HCl
Lipase
Salivary Amylase
Peptidase
Nuclease
Maltase
NaHCO3
7
Ms. Isenor
Name:_____________________________
Biology 12 Digestion Workbook
DIGESTIVE ORGANS
a. Mouth, salivary glands
CARBOHYDRATE
PROTEIN
LIPID
MECHANICAL
OTHER FUNCTIONS
Salivary amylase:
digests starch
to maltose
b. Pharynx, esophagus
Deglutition,
peristalsis
c. Stomach
• Secretes intrinsic factor
• Produces hormone
stomach gastrin
d. Pancreas
Pancreatic lipase:
digests about 80%
of fats
e. Intestinal juices
f. Liver
No enzymes for
for digestion
of carbohydrates
g. Large intestine
No enzymes
for digestion
of carbohydrates
No enzymes
for digestion
of protein
No enzymes for
digestion of lipids
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