Food And Digestion

Question 1

Describe how to test for starch

Answer 1

Reddish brown iodine solution turns blue black

Question 2

How to test for glucose

Answer 2

Blue Benedict’s solution turns brick red when heated with sugars like glucose

Question 3

What is the role of vitamin a in the body ? Where to find it.

Answer 3

Makes chemicals in retina and protects eyes surface

Carrots and fish liver oils

Question 4

What is the purpose of vitamin c in the body ? Where to find it ?

Answer 4

Sticks cell linings together
Fresh fruits (citrus)

Question 5

What is the purpose of vitamin d in the body ? Where is it found ?

Answer 5

Helps bones absorb calcium , found in cream , butter and sunlight

Question 6

What is the use of calcium in the body ? Where can you find it ?

Answer 6

Makes bones and teeth

Found in dairy products

Question 7

What is the use of iron in the body and where is it found ?

Answer 7

Makes haemoglobin

Found in red meat

Question 8

What enzyme breaks down starch , where is it found and what does it break it down into

Answer 8

Amylase and maltase
Made by salivary glands , pancreas and found in small intestine
Broken down into glucose

Question 9

What enzyme breaks down protein , where is it found and what does it break it down into

Answer 9

Pepsin , tripsin
Stomach, pancreas , small intestine
Broken down into amino acids

Question 10

What enzyme breaks down lipids, where is it found and what does it break it down into

Answer 10

Lipase,
Pancreas, small intestine
Fatty acids and glycerol

Question 11

What is absorption

Answer 11

The products of digestion absorbed into your blood stream in the small intestine

Question 12

What is assimilation ?

Answer 12

The digested food products are absorbed into the cells of the body

Question 13

What is egestion

Answer 13

Water , undigested food , enzymes , dead cells , bile pigments and mucus is removed via the anus as faeces

Question 14

What are villi

Answer 14

Structures in the small intestines that increase the surface area for maximum absorption. They have a good blood supplies and thin 1 cell thick layer to make diffusion easy

Question 15

What is bile and what makes it ?

Answer 15

The liver makes bile and it is stored in the gall bladder . Bile is a liquid which emulsifies any large any large lipid molecules. It also alkaline so it neutralises the semi digested food that comes from the stomach

Question 16

Name the parts of a balanced diet

Answer 16

Carbohydrates , protein, lipids , vitamins ,minerals , water , fibre

Question 17

What are the chemical elements present in carbohydrates. And what do carbohydrates do

Answer 17

Carbs are sugars and starches. They are made up if atoms of carbon, hydrogen and oxygen

Question 18

What is the purpose of the mouth ?

Answer 18

• chewing food into bolus

- salivary glands make amylase

Question 19

What is peristalsis ?

Answer 19

Waves of muscle contractions pushing the bolus into the stomach

Question 20

What is the purpose of the stomach ?

Answer 20

• its ph 2
• pepsin digests protein
• muscles churn food

Question 21

What is the purpose of the liver ?

Answer 21

-produce bile

Question 22

What is the purpose of the gall bladder ?

Answer 22

-stores bile made by liver

Question 23

What is the purpose of the pancreas ?

Answer 23

-secretes amylase and lipase

Question 24

What happens in the small intestine ?

Answer 24

• final digestion

- absorption