b3.7making digestion efficient

Question 1

Describe the conditions needed for the protease enzyme pepsin from the stomach to work

Answer 1

acidic

Question 2

Describe how your body creates the right ph in the stomach for this enzyme

Answer 2

Hydrochloric acid is made in glands in the stomach lining

to produce low pH (acidic conditions).

Question 3

Describe how bile results in a large surface area for lipase to work

Answer 3

alkaline

Question 4

describe how bile results in large surface area for lipase to work

Answer 4

Liver produces bile, stored in gall bladder and released when food
enters small intestine.
Bile is alkaline, neutralising stomach acid to create a slightly alkaline
environment in small intestine.

Question 5

Explain why this is important

Answer 5

Bile emulsifies fats,

breaking large fat droplets into smaller droplets

Question 6

Describe the passage of a meal containing bread through your digestive system.

Answer 6

Fats do not mix with other liquids in digestive system, staying as large
globules that are hard for lipase enzymes to act on.
Larger surface area produced by bile action
allows enzymes to reach more fat molecules and break them down
more quickly