7.4 chemical digestion

Question 1

chemical digestion

Answer 1

break down of large insoluble molecules into small soluble
molecules

Question 2

amylase

Answer 2

breaks down starch —-> simple reducing sugars
- acts in the mouth, small intestine
- secreted in salivary glands nd pancreas

Question 3

protease

Answer 3

break down proteins —> amino acids
- acts in stomach and small intestine
- secreted in stomach and pancreas

Question 4

lipase

Answer 4

breaks down fats and oils —-> fatty acids and glycerol
- acts in small intestine
- secreted in pancreas

Question 5

reason for chemical digestion

Answer 5

so it is easy to be absorbed by the small intestine to the blood

Question 7

functions of hydrochloric acid in gastric juice (stomach)

Answer 7

• kills harmful microorganisms in food
• provides the low pH needed for enzyme activity in the stomach.