Food Test And Digestion

Question 1

What is the test for starch

Answer 1

Add iodine
if starch present goes from yellow-brown to blue-black

Question 2

What is the food test for sugar

Answer 2

Add Benedicts AND heat.
If sugar present goes from blue to green to brick red

Question 3

What is the test for protein

Answer 3

Add Biuret
If protein present goes from blue to Purple

Question 4

What is the test for fat

Answer 4

Add ethanol and water
Mix
If cloudy emulsion fat present

Question 5

If food is burnt and energy release it can be used to heat water.
The equation to calculate energy in 1 g of food is:

Rise in temperature x volume of water x 4.2

If l burnt 5g of crisps and the temperature of 100cm3 of water went from 20 to 90 degrees C. How much energy in 1 g?

Answer 5

5g of crisps
Temperature rise = 70

Rise in temp x volume x 4.2 =
70 x 100 x 4.2 = 29400J in 5 g
In 1g of crisp then 29400/5 = 5880J

Question 6

What is the unit for energy

Answer 6

Joule (J)

Question 7

What is the hard outside part of the tooth called

Answer 7

Enamel

Question 8

What is the name of the part of tooth that contains blood vessels and nerves

Answer 8

Pulp cavity

Question 9

What is the living part of tooth found just below enamel

Answer 9

Dentine

Question 10

What is the part of the tooth found above gums

Answer 10

Crown

Question 11

What forms plaque

Answer 11

Plaque formed from bacteria in mouth reacting with food especially sugar
Will produce acid that burns a hole through enamel

Question 12

What 2 food nutrients needed for strong teeth

Answer 12

Calcium and vitamin D

Question 13

What do we need carbohydrates in diet for

Answer 13

Energy

Question 14

What is protein needed for

Answer 14

Growth and repair

Question 15

What is fat needed for

Answer 15

Energy store
Insulation

Question 16

What is fibre needed for

Answer 16

Prevent constipation

Question 17

What food are rich in starch

Answer 17

Potatoes
Pasta
Rice
Bread

Question 18

What foods are rich in sugar

Answer 18

Sweets
Fizzy drinks
Honey

Question 19

What foods are rich in protein

Answer 19

Fish
Meat
Eggs
Milk

Question 20

What foods contain fat

Answer 20

Oil
Butter
Sausages

Question 21

What is the name given when food enters the mouth

Answer 21

Ingestion

Question 22

What is digestion

Answer 22

Breaking down large insoluble molecules to small soluble molecules

Question 23

What is found in the stomach and what is it’s job

Answer 23

Acid (hydrochloric acid) to kill bacteria

Question 24

What is the wave like movement of material down the oesophagus called

Answer 24

Peristalsis

Question 25

What happens in the small intestine

Answer 25

Food is broken down (digested) by enzymes and then passes into the blood

Question 26

What 3 enzymes are used in digestion

Answer 26

Amylase, protease, lipase

Question 27

What do amylase break down

Answer 27

Breaks down starch to sugars

Question 28

What does protease break down

Answer 28

Protein to amino acids

Question 29

What does lipase break down

Answer 29

fats to fatty acids and glycerol

Question 30

What in the smallintestine helps make a large surface area for absorption of food into blood

Answer 30

Villi

Question 31

What food group will end up in the large intestine

Answer 31

Fibre

Question 32

What material gets absorbed into blood from large intestine

Answer 32

Water

Question 33

What is the name for removal of waste from digestive system

Answer 33

Egestion

Question 34

What are the front teeth called and their function

Answer 34

Incisors To cut food

Question 35

What are the linty teeth called and job

Answer 35

Canine Used to tear food

Question 36

What are the large teeth at back called

Answer 36

Premolars and molars - used to crush and grind food

Question 37

What is used in chemical digestion of food

Answer 37

Enzymes

Question 38

What is used in mechanical digestion of food

Answer 38

Teeth, tongue and stomach

Question 39

What adaptations do small intestine have to allow absorption of food

Answer 39

Thin walled Villi to increase surface area Good blood supply

Question 40

Balanced diet

Answer 40

Eating the right amount of each food group

Question 41

Unbalanced diet

Answer 41

Not eating the right amount of each food group