HARD
Upper Secondary: IGCSE
IMPORTANT
Earn 100
How many cells does an oxygen molecule have to pass through, to get from an alveolus into the blood?
Important Questions on Respiration and Gas Exchange
HARD
Upper Secondary: IGCSE
IMPORTANT
Determine that the following description apply to aerobic respiration, anaerobic respiration or to both?
Lactic acid or alcohol is made.
HARD
Upper Secondary: IGCSE
IMPORTANT
Determine that the following description apply to aerobic respiration, anaerobic respiration or to both?
The energy released from glucose.
HARD
Upper Secondary: IGCSE
IMPORTANT
Determine that the following description apply to aerobic respiration, to anaerobic respiration or to both?
Carbon dioxide made.
HARD
Upper Secondary: IGCSE
IMPORTANT
Determine that the following description apply to aerobic respiration, to anaerobic respiration or to both?
Heat released.
HARD
Upper Secondary: IGCSE
IMPORTANT
Explain the meaning of the term gas exchange surface in human lungs.
HARD
Upper Secondary: IGCSE
IMPORTANT
List three features of gas exchange surfaces.
HARD
Upper Secondary: IGCSE
IMPORTANT
Explain how each feature in your lungs helps gas exchange to happen efficiently.
HARD
Upper Secondary: IGCSE
IMPORTANT
Copy and complete this table to summarise what happens during breathing.
| Breathing in | Breathing out | |
| External Intercostal muscles | ||
| Diaphragm Muscles | ||
| Volume of Thorax | ||
| Pressure in Lungs |
