2. Which of these is not found in saliva in the mouth?
A. Amylase
B. Mucus
C. Lipase
D. Water
3. The diagram show peristalsis in the gut.
Which row correctly states what is happening to circular and longitudinal muscles at X and Y ?
At X
At Y
Circular Muscles
Longitudinal Muscles
Circular Muscles
Longitudinal Muscles
A
Contracted
Contracted
Relaxed
Contracted
B
Contracted
Relaxed
Contracted
Relaxed
C
Relaxed
Contracted
Relaxed
Relaxed
D
Contracted
Relaxed
Relaxed
Contracted
4. After passing through the oesophagus, digestion continues in the stomach.
To aid digestion an acid is produced by the cells of the stomach wall.
This acid provides the correct pH for the enzyme ..
A. amylase
B. lipase
C. protease
D. sucrase
5+6: After the stomach the partly digested food enters the small intestine where bile is added.
5. Which row gives correct statements about bile?
Made in the ..
Stored in the ..
Emulsifies fats?
Makes gut contents ..
A
gall bladder
gall Bladder
No
acidic
B
liver
gall bladder
No
acidic
C
liver
gall bladder
Yes
alkaline
D
liver
liver
Yes
alkaline
6. The diagram shows the action of bile.
Which statement correctly states the action of bile?
A. Decreases the surface area of the fat droplets
B. Changes the fat droplets into molecules of fat
C. Changes large fat molecules into fatty acids and glycerol
D. Increases the surface area of the fat droplets
7. To help further with digestion a liquid produced in the pancreas passes into the small intestine. This liquid contains the enzyme pancreatic amylase.
Pancreactic amylase changes ..
A. protein to amino acids
B. starch to maltose
C. maltose to glucose
D. glucose to starch
8+9: The diagram shows a villus from the lining of the small intestine.
8. Which features of the small intestine improve the absorption of digested food?
A. The villi increase the surface area
B. The thin wall of the villus allows sugars to be absorbed more quickly
C. Capillary network in the villus increases absorption of sugars and amino acids
D. All of the above
9. Which of these substances are absorbed into the lacteal vessel?
A. Water
B. Glucose
C. Fatty acids and glycerol
D. Vitamins
10. Which of the following shows the correct order of events in the alimentary canal?
