Transcript digestion investigations

Amylase
Mouth
Lipase
Splat
Amylase
Carbohydrase
Protease
Glycerol
Acid
Glucose
Amino
acids
Intestine
Alkali
Stomach
Mouth
Lipase
Carbohydrase
Protease
Glycerol
Acid
Alkali
Glucose
Amino
acids
Intestine
Stomach
Objectives
A* - Explain how specific conditions allow enzymes to
do their jobs AND evaluate the results of tests
A – Describe the progress of digestion using the
keyword names of enzymes AND explain using ideas of
enzymes
B – Know the purpose of digestion and the food
molecules and what they are broken down into AND
describe the results of tests
Enzymes –
• Amylase – Saliva,
pancreas and small
intenstine
• Protease – Stomach
juice, Pancreas
• Carbohydrase –
Pancreas
• Lipase – Pancreas and
Small Intestine
• HCl – Stomach
• Bile – Gall bladder
Enzymes –
• Amylase – Digests starch
to sugars
• Protease – proteins to
amino acids
• Carbohydrase – Sugars
to smaller sugars
• Lipase – Fat into glycerol
and fatty acids
• HCl – Optimum
conditions
• Bile – Emulsification and
alkaline
Describe then explain
1
8
2
7
3
6
4
5
Spit was added to starch and iodine. Each well was taken
from the total mixture after 30 seconds.
Amylase
Boiled saliva
1. What are your
results? Describe in
as much detail as
possible.
2. Can you explain
your results from
test tube A
Saliva
3. Can you explain why
test tube B had
different results?
Lipase
1. What are your results?
Describe in as much
detail as possible.
2. Phenolphthalein is pink in
alkaline conditions and is
colourless in acid or
neutral conditions. Can
you explain your results
Lipase
Boiled
lipase
3. Why do you add sodium
carbonate (alkaline)
Lipase
& bile
salts
4. If you measured the pH
of each tube what would
you find and why
Pepsin
1. What are your
results? Describe in
as much detail as
possible.
2. Can you explain
your results?
Pepsin
& egg
white
Egg
white
& acid
Egg
white,
acid &
pepsin
Egg
white,
acid &
boiled
pepsin
3. Why do you get
different results
with hydrochloric
acid?
Amylase
Mouth
Lipase
Splat
Amylase
Carbohydrase
Protease
Glycerol
Acid
Glucose
Amino
acids
Intestine
Alkali
Stomach
Mouth
Lipase
Carbohydrase
Protease
Glycerol
Acid
Alkali
Glucose
Amino
acids
Intestine
Stomach