B3.7 - Making Digestion Efficient (Finsihed)

Question 1

Why does the stomach produce a thick layer of mucus inside it?

Answer 1

It protects the stomach walls from being digested from the acid and enzymes

Question 2

In what kind of (pH) environment do enzymes in the stomach work best at?

Answer 2

Acidic

Question 3

In what kind of (pH) environment do enzymes in your small intestine work best?

Answer 3

Alkaline

Question 4

How is the acid coming from the stomach converted to alkaline for the small intestine?

Answer 4

Because of bile from the liver. Bile alao emulsifies fats

Question 5

Why do the fats in your stomach (from food) have to be emulsified by bile?

Answer 5

Because fats do not mix up with the watery liquids in your stomach and stay as large globules like oil in water. This makes it difficult for the lipase enzyme to act.

Question 6

Enzymes need the ______ possible ______ area for them to work best on.

Answer 6

Largest, surface

Question 7

Bile _______ fat

Answer 7

Emulsifies

Question 8

What does the bile ‘emulsifying’ fats actually do/mean?

Answer 8

The bile breaks up large drops of fat into smaller droplets. This provides a larger surface area of fats for the lipase enzyme to work on.

Question 9

What 3 things does your stomach do?

Answer 9

• Pummels food with muscular walls
• Produces protease enzyme pepsin
• produces hydrochloric acid to kill bacteria and give the right pH for pepsin