1.5 Breathing and respiratory system

Question 1

What is aerobic respiration

Answer 1

Exothermic reaction
Uses oxygen
Releases Carbon dioxide, water and energy
Takes place in mitochondria

Question 2

How are the alveoli adapted for gasesous exchange

Answer 2

Thin
large surface area
good blood supply to maintain a good diffusion gradient
moist walls
permeable

Question 3

What is the word equation for aerobic respiration

Answer 3

Glucose + Oxygen ——-> Carbon dioxide + Water + Energy

Question 4

What is the chemical equation for aerobic respiration

Answer 4

C6H12O6 + 6O2——> 6CO2 + 6H2O + Energy (know which are subscript)

Question 5

Why does your rate of breathing and depth of breathing increase when you exercise

Answer 5

To deliver MORE oxgen and remove MORE carbon dioxide

Question 6

What is meant by the recovery rate

Answer 6

The time it takes for the breathing rate to return to normal after exercise

Question 7

What is meant by anaerobic respiration

Answer 7

Respiration without oxygen

Question 8

Anaerobic respiration in mammals produces what product

Answer 8

lactate (Lactic acid)

Question 9

What effect does lactic acid have on the body

Answer 9

Causes muscle fatigue
can cause cramp as slowly poisons muscle

Question 10

How does the body remove lactic acid

Answer 10

After exercise continue to breathe deeply during recovery - this brings in extra oxygen which breaks down the lactic acid to water and carbon dioxide

Question 11

What is the name given to the breaking down of lactic acid using oxygen

Answer 11

Repaying the Oxygen Debt