Active Transport

1. 2.

3. 4.

Active Transport

Exchange in the Lungs

Alveoli

Alveoli have thin walls, a large surface area and a rich blood supply

Exchange in the Gut

As the concentration increases in the small intestines active transport will occur to ensure

no food is wasted.

The gills have a large surface area, thin walls and a rich blood supply

Simple diagram of inside a leaf

Stomata open and closed

The Circulatory System

The Circulatory System

The Circulatory System

The Circulatory System

Transport in Blood

Transport in Blood

Aerobic Respiration

Anaerobic Respiration

The Kidney

The Kidney

• The blood is filtered and all the sugar is reabsorbed.

• Mineral ions and water needed are selectively reabsorbed.

• The mineral ions, water and urea are removed in the urine

• The sugar is reabsorbed by active transport

Dialysis

-If a kidney is damaged or failing dialysis can be carried out.-The dialysis fluid contains the same concentration of glucose and mineral ions as the blood. -The dialysis fluid contains no urea.-It is a time consuming process-Must have a controlled diet

Transplant

-A donor is required-The donor kidney maybe rejected-Must take immunosuppressants drugs for the rest of their life-Can have a normal diet

Bacteria

Antibiotics

• The product made is used as a fuel

• A slurry is produced that is used as a fertiliser

The production of methane is an exothermic reaction

The generators can be built above ground or underground.

• Initial costs are more to build

• Harder to repair• Cheaper long term as

it keeps heat in• Have to be trained to

use it

• Cheaper to build• Easier to repair• Costs more long term as

more heat is radiated• Have to be trained to

use it

More Biogas • Sugar cane and maize is fermented anaerobically to produce ethanol.

• It is distilled.

• It is a carbon neutral fuel.