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6. What happens to starch in the mouth
- Dissolved by saliva
- Hydrolysed by a-amylase enzyme
- Cleave by lingual lipase
- Swallowed in bolus of food
7. What is the acidic component of gastric juice
- electrolytes
- gastric acid
- hydrochloric acid
- enzymes
8. How long is the oesophagus
9. Which part of the intestines does the pyloric sphincter lead to
- colon
- duodenum
- jejunum
- ileum
10. What are the 3 layers of the stomachs muscular sac
- smooth, circular, skeletal
- longitudinal, circular, oblique
- latitudinal, circular, oblique
- ascending, transverse, descending
11. What do the salivary glands produce?
- bile
- a-amylase and lipase
- lipase and proteases
- pepsinogen
12. Which layer is the circular muscle
13. What is the name of the muscular waves which push the bolus of food through the digestive system?
- Contraction
- Swallowing
- Peristalsis
- Segmentation
14. Which organs produce bile salts?
- Liver and gall bladder
- Stomach and liver
- Liver and pancreas
- Pancreas and gall bladder
15. Which of these is not contained in saliva
- Lipids
- Electrolytes
- Enzymes
- Mucus
16. What is involved in swallowing
- Pushing food from mouth into oesophagus
- Smooth and skeletal muscles
- All of the above
- Tongue, pharynx and mouth
17. Which cells make up the top of the gastric pit
- parietal cells and enteroendocrine cells
- surface mucosal cells
- surface mucous and mucous neck cells
- epithelial cells and chief cells
18. What do the lingual glands secrete
- Lingual protease
- Saliva
- Lingual lipase
- Lingual amylase
19. What is the action of physically breaking down and hydrating food
- mastication
- creating a bolus
- peristalsis
- segmentation
20. What enables the oesophagus to move a bolus of food
- Gravity
- The lubrication of saliva
- Layer of muscle which contracts
- Layer of supportive tissues
