Life Processes

Question 1

Write the word equation for aerobic respiration

Answer 1

Glucose+ Oxygen—>carbon dioxide+ water+(energy)

Question 2

From which system does the body obtain glucose for respiration?

Answer 2

The digestive system

Question 3

In which part of ourselves is respiration mainly occur?

Answer 3

In the mitochondria

Question 4

What are the products of respiration?

Answer 4

Carbon dioxide, water

Question 5

How do we test for carbon dioxide?

Answer 5

Bubble fruit lime water; the lime water turns cloudy

Question 6

The word “aerobic” indicates the presence of which gas?

Answer 6

Oxygen

Question 7

How many joules are there in a kilojoule?

Answer 7

1000 J

Question 8

Which unit is energy usually measured in?

Answer 8

Joules, J

Question 9

What is the symbol for kilojoule?

Answer 9

kJ (lower case k, capital J)

Question 10

Food is high energy, which which nutrient/s is it likely to contain?

Answer 10

Lipid/fat, carbohydrates

Question 11

List the seven nutrients needed by the human body

Answer 11

Carbohydrates, proteins, lipids, vitamins, minerals, water, fibre

Question 12

Foods high in which group helped muscle repair?

Answer 12

Protein

Question 13

Why is fibre needed in our diet?

Answer 13

Add bulk to food to help it pass through the digestive system; prevents constipation

Question 14

Scurvy can occur when we don’t get enough of which vitamin?

Answer 14

C

Question 15

Give two sources of vitamin C

Answer 15

Fruits and vegetables

Question 16

Rice, potatoes and bread, a good sources of

Answer 16

Carbohydrates

Question 17

Rice, potatoes and bread, a good sources of

Answer 17

Carbohydrates

Question 18

Fish meat and nut are good sources of

Answer 18

Protein

Question 19

Sugar and statue, both types of

Answer 19

Carbohydrates

Question 20

Which test do we use to detect the presence of starch?

Answer 20

Iodine

Question 21

Which test do we use to detect the presence of sugar?

Answer 21

Benedicts

Question 22

Which test do we use to detect the presence of sugar?

Answer 22

Benedicts

Question 23

Which test do we use to detect the presence of protein?

Answer 23

Biuret

Question 24

Which test do we use to detect the present of fats?

Answer 24

Ethanol

Question 25

What is digestion?

Answer 25

The process of breaking down food into substances our body can absorb and use

Question 26

Where does mechanical digestion mainly occur?

Answer 26

In the mouth

Question 27

List the organs, the food or travel through on its way through the digestive system

Answer 27

Mouth, oesophagus, stomach, small intestines , large intestine, rectum, anus

Question 28

Which nutrient starts to be chemically digested in the mouth?

Answer 28

Carbohydrate

Question 29

Where does digestion of protein take place?

Answer 29

Stomach and small intestine

Question 30

Where does the digestion of lipids take place?

Answer 30

Small intestine

Question 31

Which organ produces carbohydrase, protease and lipase?

Answer 31

Pancreas

Question 32

What is the purpose of hydrochloric acid in the stomach?

Answer 32

Provide the right pH for the proteins enzymes; kills bacteria

Question 33

What is the purpose of bile in the digestive system?

Answer 33

Neutralise the acid which was added to the food in the stomach to give the best pH for enzymes to work. Breakdown (emulsify) fat.

Question 34

Where is bile produced?

Answer 34

Liver

Question 35

Where is bile stored?

Answer 35

Gallbladder

Question 36

The site of maximum absorption in the digestive system is…

Answer 36

The small intestine

Question 37

During digestion, carbohydrate is broken down into

Answer 37

Glucose

Question 38

During digestion, protein is broken down into

Answer 38

Amino acid

Question 39

During digestion, lipids are broken down into

Answer 39

Fatty acid and glycerol

Question 40

Which enzyme digest protein?

Answer 40

Protease

Question 41

Which enzyme digests carbohydrates?

Answer 41

Carbohydrase

Question 42

Which enzyme digests fats?

Answer 42

Lipase

Question 43

Why is fibre not digested in the body?

Answer 43

Our bodies do not have enzymes that can digest fibre

Question 44

What are vitamins and minerals not digested in the body?

Answer 44

They are small enough to be absorbed without digestion

Question 45

What is the purpose of bacteria in our gut?

Answer 45

Digest food, we cannot(e.g. cellulose) to give us a essential nutrients(e.g. vitamin K)

Question 46

In which part of the digestive system does water and mineral absorption take place?

Answer 46

The large intestine

Question 47

How is this small intestine adapted to increase the rate of absorption?

Answer 47

Villi and microvilli to increase surface area; a good blood supply to transport nutrients; mucus for lubrication; glucose moves from a high concentration in the intestine to lower concentration in the blood

Question 48

What are the optimal conditions for amylase?

Answer 48

Neutral pH, 37° C

Question 49

What happens to an enzyme if it is boiled or exposed to a strong acid?

Answer 49

It is denatured

Question 50

What is the scientific name for the windpipe?

Answer 50

Trachea

Question 51

The trachea divides into two_____. These then divide into_______.

Answer 51

Bronchi. Bronchioles

Question 52

The trachea divides into two_____. These then divide into_______.

Answer 52

Bronchi. Bronchioles

Question 53

What are the air at the end of each bronchiole called?

Answer 53

Alveoli

Question 54

Breathing in and out is known as

Answer 54

Ventilation

Question 55

When we inhale the volume thorax ________ so the pressure inside the thorax_____

Answer 55

Increases. Decreases.

Question 56

When we exhale the diaphragm releases and moves upward/downwards

Answer 56

Upward

Question 57

What features do alveoli have to maximise gas exchange?

Answer 57

Large surface area; concentration gradient(oxygen, and carbon dioxide can diffuse); good blood supply; capillary wall only one cell thick

Question 58

Write the word equation for anaerobic respiration and cells

Answer 58

Glucose-> lactic acid

Question 59

Which releases more energy-aerobic or anaerobic respiration

Answer 59

Aerobic

Question 60

What is anaerobic respiration in the yeast cells known as?

Answer 60

Fermentation

Question 61

Give an example of where fermentation is used

Answer 61

Brewing or baking

Question 62

What are the products of the fermentation reaction?

Answer 62

Ethanol, carbon dioxide