Digestion and Enzymes

Question 1

What is digestion?

Answer 1

Digestion is the breakdown of large molecules into small molecules which can be absorbed by the blood

Question 2

why we need to digest our food

Answer 2

We need the food molecules to be small enough so it can be absobed easily by the small intestine

Question 3

Mechanical digestion - mouth

What does it do

Answer 3

Teeth grind and chop the food

Tounge shapes and mixes

Question 4

What does the mouth do?

Answer 4

Role of teeth and salvia

Question 5

What does Oesophagus do

Answer 5

muscles contract to push food down to stomach

Throat bit

Question 6

What does stomach do

Answer 6

churning of food, digestion of protein, role of hydrochloric acid

Mixes food with gastric

Question 7

What does small intestine do?

Answer 7

Absorbs digested food

Question 8

What does Pancreas

Answer 8

production of digestive enzymes which pass into the small intestine.

Question 9

What does liver do?

Answer 9

Makes bile

Question 10

What does gall blader do

Answer 10

storage of bile before release into small intestine

Question 11

What does large intestine do

Answer 11

absorption of water to form faeces

Question 12

What does rectrum do

Answer 12

Stores faeces

Question 13

What type of catalyst is the enzyme and what does it do💩

Answer 13

enzymes are biological catalysts which speed up reactions in living organisms.

Question 14

Explain how enzymes work (lock and key hypothesis) Know that they are specific.

Answer 14

Only certain enzymes can fit together like a perect lock and key

Question 15

Mechanical digestion - stomach

Answer 15

Muscles churn the food

Question 16

Chemical digestion - mouth

Answer 16

Saliva contains enzymes and breaks down starch molecules

Question 17

Chemical digestion - stomach

Answer 17

Hydrochloric acid and enzymes

Gastric juice

Question 18

Chemical digestion - pancreas

Answer 18

Enzymes

Question 19

Chemical digestion - liver

Answer 19

Bile

Question 20

How does bile help digestion

Answer 20

Breaks down fats

Question 21

Difference between chemical and mechanical digestion

Answer 21

Mechanical digestion involves physically breaking the food into smaller pieces. Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when food mixes with saliva.

Question 22

How are enzymes affected by temperature

Answer 22

At low temp enzymes work slowly because there isnt enough energy

At high temps enzymes do not work because they have been denatured

Question 23

What type of enzymes do we need to break down proteins?

Answer 23

Protease

Question 24

What type of enzymes do we need to break down fats?

Answer 24

Lipase

Question 25

What type of enzymes do we need to break down carbohydrates

Answer 25

Carbohydrase

Question 26

What does optimum temperature mean?

Answer 26

The perfect temperature

Question 27

Why do protease only able to break down proteins

Answer 27

They have the same active site shape

Question 28

What makes enzymes more active

Answer 28

Warmer temp, more collisions. More collisions = more active

Question 29

How does pH help in digestion?

Answer 29

The acidic environment helps with the digestion of food. The enzyme pepsin, which helps break down proteins in the stomach can only function optimally in the low pH environment.

Low pH = more acidic