Aqa Biology Unit 3

Front 1

What microbe is used to produce ethanol?

Back 1

Yeast.

Front 2

What piece of equipment is used to make biogas?

Back 2

A biogas generator.

Front 3

Is biogas made via aerobic or anaerobic fermentation?

Back 3

Anaerobic.

Front 4

What type of pollution is caused by sulphur dioxide?

Back 4

Acid rain

Front 5

In order to increase the chances of a successful transplant, a person must have a similar ___-type to you?

Back 5

Tissue-type

Front 6

What is found in dialysis fluid when the process is complete?

Back 6

Urea, glucose, mineral ions.

Front 7

What does deforestation do to biodiversity?

Back 7

It dereases it.

Front 8

What is peat?

Back 8

Partially decomposed plant matter usually found in acidic bogs.

Front 9

What gas is released the most when wood is burnt?

Back 9

Carbon dioxide.

Front 10

What is deforestation?

Back 10

Cutting down large areas of trees.

Front 11

How does your body respond when its cold?

Back 11

The thermoregulatory centre in the brain detects a change in the temperature of the blood.

The blood vessels suppling the skin constrict stopping heat radiating from it.

Your muscles also begin to contract to produce heat via respiration causing you to shiver.

Front 12

How does your body respond when its hot?

Back 12

The thermoregulatory centre in the brain detects a change in the temperature of the blood.

The blood vessels suppling the skin dialate allowing heat to radiate from the skin.

Your sweat glands activate and secrete sweat which cools you down via evaporation.

Front 13

What are the downsides of using stem cells to treat diabetes?

Back 13

Human embryos will have to be destroyed.

Front 14

What are the benefit and downsides of getting a transplant to treat kidney failure?

Back 14

You dont have to make and lifestyle or diet changes.

You wont have to constantly use a dialysis machine.

However, you will have to be on immunosuppresant drugs for the rest of your life which increase the risk of infections.

Front 15

What in the kidneys is filtered and what is reabsorbed?

Back 15

The blood is filtered.

All urea is filtered out.

All glucose is reabsorbed

Excess water and mineral ions are filtered out.

Front 16

Describe how glucagon is released into the body and what it does.

Back 16

Low blood sugar is detected by the pancreas which secretes glucagon. This triggers glycogen to be converted to glucose in the liver.

Front 17

Describe how insulin is released in the body and what it does.

Back 17

High blood sugar is detected by the pancreas which secretes insulin triggering glucose to be converted to glycogen in the liver. It also triggers cells to take in more glucose.

Front 18

Why do we used peat?

Back 18

It is a source of fuel and a good compost.

Front 19

Why does deforestation occur?

Back 19

It creats land for farming, housing and infrastructure.

Front 20

What does global warming do to earth and its inhabitants?

Back 20

It increase the average temperature, sea levels, reduces biodiversity and changes migration pattern which can affect food chains.

Front 21

What fungus is used in the production of mycoprotein?

Back 21

Fusarium

Front 22

How can you reduce overfishing?

Back 22

Implementing law and increasing the size of the gaps in fish net.

Front 23

What does deforestation do to the CO2 in the atmosphere?

Back 23

It increases the amount of CO2 and decrease the rate in which it is removed.

Front 24

What type of animal and what type of crop release methane into the atmosphere?

Back 24

Cattle

Rice crops

Front 25

How can the efficiency of a food chain be increased?

Back 25

Reduce the number of stages.

Front 26

What three things does the waste humans produce pollute?

Back 26

Air

Land

Water

Front 27

Destorying peat bogs releases what gas?

Back 27

Methane.

Front 28

As the human population increases, what happens to the land available for plants and animals?

Back 28

It decreases.

Front 29

As the human population increases what happens to the average quality of life?

Back 29

It increases.

Front 30

What is osmosis?

Back 30

The diffusion of water molecules through a partially permeable membrane going from a dilute to concentrated solution.

Front 31

What chemical allows red blood cells to transport oxygen?

Back 31

Haemoglobin

Front 32

What are the 4 components of the blood and what are their functions?

Back 32

Red Blood Cells - transporting oxygen around the body.

White Blood Cells - fighting pathogens

Platelets - forming blood clots

Plasma - transporting substances.

Front 33

What are the downsides of dialysis?

Back 33

You have to change your diet, you have to be on dialysis for 8 hours a day. There is also a risk of infection when changing dialysis fluid.

Front 34

Why does dialysis fluid flow in the opposite direction to a person's blood?

Back 34

It maintains the high concentration gradient

Front 35

What are the effects of damaging your alveoli?

Back 35

The internal surface area of your lungs is reduced therefore reducing the rate of gaseous exchange

Front 36

Why do your veins and your heart have valves?

Back 36

This ensures blood flows in the right direction.

Front 37

What are the effects of deforestation?

Back 37

Sequestered CO2 is released, the rate in which CO2 is removed it reduced and there is a reduction in biodiversity.

Front 38

What factors affect the rate of transpiration?

Back 38

Light (size of the stomata)

Temperature

Wind

Humidity

Front 39

Describe the process of transpiration.

Back 39

The water is absorbed by the root hair cells. It them moves up the plant via the xylem. The water then evaporates in the leaves and diffuses out of the plant.

Front 40

What medical instruments are used if arteries begin to narrow and restrict blood flow?

Back 40

Stents

Front 41

How are the surface area of roots increased?

Back 41

Root hair cells

Front 42

What properties of leaves increase their surface area?

Back 42

Their flattened shape and air pockets.

Front 43

What properties do the villi have in the small intestine to maximise the absorption of food products?

Back 43

Extensive capillary systems.

Front 44

What is the path of water from the roots to the leaves called?

Back 44

Transpiration stream

Front 45

What is the scientific name for the passage of air in and out of the lungs?

Back 45

Ventilation

Front 46

Where are the villi found in the body?

Back 46

The small intestine

Front 47

What organ controls blood sugar levels?

Back 47

The pancreas.

Front 48

How is urea produced in the body?

Back 48

Excess amino acids are broken down in the liver to urea.

Front 49

Where is lactic acid removed?

Back 49

It is oxidised in the liver.