Diffusion
Partially permeable membrane
Osmosis
Osmosis in sugar solution
Osmosis in cytoplasm in cell
Osmosis in animals
Osmosis in plants
Active transport
Moving substances of active transport
Importance of active transport
What sport drinks contain
Biological processes occurring when you exercise.
What's a sport drink
Evaluating sports drinks
Evaluating sport drinks negatives
Proficiency of lungs
Adaptations for exchanging material in
Musk turtles adaptation for exchange in materials
Exchange of gases in the lung
Ventilating the lungs
Thorax
diaphragm
How ventilation of lungs work
Exchange in gut
Absorption in the small intestine
Villi
Small intestine blood supply
Active transport in the small intestine
Exchange in plants
Gas exchange in plants
Problems with gas exchange in plants
Stomata
Uptake of mineral ions and water in plants
Transpiration stream
Effect of environment on transpiration
Controlling water loss in transpiration
The circulatory system
Double circulation
Heart as a pump
Heart structure
Arteries
Veins
Capillaries
Stents
Bypass surgery
Leaky valves
Transport in the blood
Plasma
Red blood cells
White blood cells
Platelets
Artificial blood
Plasma or saline
Perfluorocarbons (PFC's)
Haemoglobin based products
Artificial heart
Phloem
Xylem
Why plant transport is important
Controlling internal conditions
Removing waste products
Removing waste products:
Carbon dioxide
Removing waste products:
Urea
Maintaining body balance
Functions of kidney
How do kidneys work
Selective reabsorbption
What urine contains
Kidney failure
Dialysis
How dialysis works
Kidney transplants
Kidney transplants:
The rejection problem
Dialysis vs transplants
Finding kidney donor
Controlling body temperature
Basic temperature control
Cooling the body down
Reducing energy loss
Treating kidney failure
Donor cards
Too hot or too cold
Controlling blood glucose
Insulin and control of blood glucose levels
What causes diabetes
Treating diabetes
Glucagon and control of blood glucose levels
Treating diabetes:
Using insulin from other organisms
Curing type 1 diabetes
Treating type 2 diabetes
Effects of population expansion
Human population growth
Effect on land and resources
Managing waste
Polluting the land
The problem with pesticides and herbicides
Polluting the water
Polluting water: Toxic chemicals
Measuring pollution levels in water
Air pollution
Formation of acid rain
Effects of acid rain
Solutions to acid rain
Global dimming
Deforestation and peat destruction
Effects of deforestation
Loss of diversity
Cows, rice and methane
Peat bog destruction
Global warming
Changing conditions
Global warming
Biofuels
Ethanol based fuels
Advantages of ethanol as fuel
Disadvantages of ethanol as a fuel
The latest biofuels
Biogas
What is biogas?
Biogas generators
Scaling up biogas generators
Food chains in food production
Artificially managed food production
Efficient farming
Food miles
Sustainable food production
Managing the oceans
Mycoprotein production
Fermenter
Mycoprotein processing
Food and water - a vicious cycle?
How can we be sure of greenhouse effect