B4: Human Biology- Breathing

Question 1

Aerobic respiration equation

Answer 1

C6H12O6 + 6O2 -> 6CO2 + 6H2O (and energy)

Question 2

3 stages of breathing out

Answer 2

1. The volume of the chest gets smaller as air goes out.
2. Decreased volume = Increased pressure
3. Pressurised air form the chest is forced into the less pressurised atmospheric air

Question 3

3 stages of breathing in

Answer 3

1. Ribs move up and out, diaphragms flattens, volume of chest increases as air comes in
2. Increased volume = Lower pressure
3. Atmospheric air at higher pressure than the chest cavity gets drawn in.

Question 4

3 main uses of energy from respiration

Answer 4

> Movement
Building new molecules
Heat generation

Question 5

Anaerobic respiration equation

Answer 5

C6H12O6 -> 2C3H6O2 (and energy)

Question 6

Anaerobic respiration equation (in other organisms)

Answer 6

C6H12O6 -> 2C2H5OH + 2CO2

Question 7

Glycogen

Answer 7

A storage carbohydrate found in the muscles, liver and brain