Organisation

Question 1

Explain why the body needs digestive enzymes.

Answer 1

Digestive enzymes break down big food molecules into smaller, soluble food molecules, which can then be absorbed into the bloodstream.

Question 2

Where is bile a) produced and b) stored?

Answer 2

a) Liver
b) Gall bladder

Question 3

What enzyme(s) are produced in the small intestine?

Answer 3

Amylase, protease & lipase

Question 4

What enzyme(s) are produced in the salivary glands?

Answer 4

Amylase

Question 5

What enzyme(s) are produced in the stomach?

Answer 5

Protease (called pepsin)

Question 6

Where are proteases produced?

Answer 6

Stomach, small intestine & pancreas

Question 7

Where is amylase produced?

Answer 7

Salivary glands, small intestine & pancreas

Question 8

Where are lipases produced?

Answer 8

Small intestine & pancreas

Question 9

How does the body digest food?

Answer 9

Mechanical digestion - teeth grinding, peristalsis in the oesophagus, stomach churning
Chemical digestion - enzymes break down food (e.g. in the mouth, stomach & small intestine)

Question 10

What three things does the liver do?

Answer 10

• Produces bile.
• Converts lactic acid into glucose by oxidising it.
• Deamination of amino acids to produce ammonia (and the conversion of ammonia into urea).