Digestion

Question 1

How do we test for glucose?

Answer 1

Add 2ml of benedict’s solution and heat in water bath at 90 degree celsius

Question 2

What is a negative result for a test for glucose?

Answer 2

Solution stays blue

Question 3

What is a positive test for glucose?

Answer 3

Solution turns brick red

Question 4

How do you test for starch?

Answer 4

Add 2ml of iodine

Question 5

Negative test for starch?

Answer 5

No change/stays yellow-brown

Question 6

Positive test for starch?

Answer 6

Turns blue-black

Question 7

How to test for protein?

Answer 7

Add 2ml of Biuret’s solution

Question 8

Negative test for protein?

Answer 8

Biuret’s stays blue

Question 9

Positive test for protein?

Answer 9

Turns purple/lilac

Question 10

How to test for lipids?

Answer 10

Add 2 drops of sample onto filter paper

Question 11

Negative test for lipids?

Answer 11

Paper remains opaque

Question 12

Positive test for lipids?

Answer 12

Filter paper turns translucent

Question 13

Why it difficult to test orange juice for lipids/protein/starch/glucose?

Answer 13

The tests use colour to show if they are positive or negative and orange juice is coloured.

Question 14

what are the 7 key nutrients?

Answer 14

Water, protein, carbohydrates, vitamins, minerals, fibre and fats

Question 15

What is a balanced diet?

Answer 15

When all 7 food groups are eaten in the right amounts

Question 16

Why do we need water?

Answer 16

To bring nutrients to cells + protect joints/muscles

Question 17

What happens if you don’t get enough water?

Answer 17

Body can’t carry out normal functions and shuts down

Question 18

Why do we need protein?

Answer 18

Growth and repair

Question 19

What happens if too much/too little protein is eaten?

Answer 19

Swelling, weak immune system, bone/muscle loss

Question 20

Why do we need carbohydrates?

Answer 20

To provide glucose for energy

Question 21

What happens if too many/too few carbohydrates are eaten?

Answer 21

Weakness, light headedness, heartache, fatigue

Question 22

Why do we need vitamins?

Answer 22

Fighting infections, wound healing, strengthening bones

Question 23

What happens if too many/too few vitamins are eaten?

Answer 23

Increased risk of cancers, heart disease, diabetes

Question 24

Why do we need minerals?

Answer 24

To maintain bone, muscle, heart and brain health

Question 25

What happens if we eat too many/too few minerals?

Answer 25

Increased risk of cancers, heart disease, diabetes, osteoporosis, depression

Question 26

Why do we need fibre?

Answer 26

Lowers risk of heart disease, type 2 disease, bowel cancer and helps digestion

Question 27

What happens if we eat too much/too little fibre?

Answer 27

Bloating, abdominal pain, constipation, irritable bowel syndrome, diverticulitis, heart disease some cancers

Question 28

Why do we need fat?

Answer 28

Helps absorb vitamins

Question 29

What happens if we eat too much/too little fat?

Answer 29

Weaker immune system, rashes, hair loss, heart disease, cancer

Question 30

What is a deficiency disease?

Answer 30

A lack of certain vitamins or minerals

Question 31

What does a vitamin D deficiency cause?

Answer 31

Rickets (problems forming bones - may result in bowed legs)

Question 32

What does a vitamin A deficiency cause?

Answer 32

Eyesight issues - specifically light detection cell function

Question 33

What does a mineral iron deficiency cause?

Answer 33

Anaemia (problems making haemoglobin in red blood cells) - pale, lacking energy

Question 34

What does pepsin do (in the stomach)?

Answer 34

Breaks down protein

Question 35

What does hydrochloric acid do (in the stomach)?

Answer 35

Activates the pepsin

Question 36

What do enzymes do?

Answer 36

Break down larger molecules of food into smaller ones so they can be digested

Question 37

What do carbohydrases break down?

Answer 37

Starch

Question 38

What do carbohydrases break starch down into?

Answer 38

Glucose

Question 39

Which enzyme breaks down starch into glucose?

Answer 39

Carbohydrases

Question 40

What do proteases break down?

Answer 40

Protein

Question 41

What do proteases break protein down into?

Answer 41

Amino acids

Question 42

What enzyme breaks down protein into amino acids?

Answer 42

Proteases

Question 43

What do lipases break down?

Answer 43

fat

Question 44

What do lipases break fat down into?

Answer 44

Fatty acids and glycerol

Question 45

What enzyme breaks down fat into fatty acids and glycerol?

Answer 45

Lipases

Question 46

Where are carbohydrases found?

Answer 46

In the mouth/small intestine

Question 47

What enzyme is found in the mouth/small intestine?

Answer 47

Carbohydrase

Question 48

Where are proteases found?

Answer 48

In the stomach/small intestine

Question 49

What enzyme is found in the stomach/small intestine

Answer 49

Protease

Question 50

Where are lipases found?

Answer 50

In the small intestine

Question 51

Which enzyme is found in the small intestine?

Answer 51

Lipase

Question 52

What does the mouth do?

Answer 52

Chews food and mixes with saliva

Question 53

What does the oesophagus do?

Answer 53

Food passes down the tube

Question 54

What does the stomach do?

Answer 54

Food is mixed with digestive juices and acids

Question 55

What does the small intestine do?

Answer 55

Digestion is completed and nutrients pass into the blood

Question 56

What does the large intestine do?

Answer 56

Water passes into the body, leaving the feces