Gas Exchange in Humans
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Gas exchange surfaces
SubtopicGas exchange surfaces under Gas Exchange in Humans for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Which part of the system is the first to filter air as it enters from the nose?
A.Bronchi
B.Trachea
C.Alveoli
D.Bronchioles
- 2.
What describes the shape of the cells that make up the alveolar wall?
A.Cube-shaped (cuboidal)
B.Flattened (squamous)
C.Tall and narrow (columnar)
D.Round (spherical)
- 3.
What gas is found in a higher concentration in expired (exhaled) air than in inspired (inhaled) air?
A.Oxygen
B.Carbon dioxide
C.Nitrogen
D.Helium
Download the worksheet for Gas Exchange in Humans - Gas exchange surfaces to practice offline. It includes additional chapter-level practice questions.
Breathing and lung function
SubtopicBreathing and lung function under Gas Exchange in Humans for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Which gas has a concentration of nearly in inspired air but about (including noble gases) in expired air?
A.Oxygen
B.Nitrogen
C.Argon and others
D.Carbon dioxide
- 2.
What is the main role of the ribcage during breathing?
A.To digest food
B.To produce air
C.To protect the lungs and change thoracic volume
D.To filter the blood
- 3.
The temperature of expired air is generally ____ than the temperature of inspired air on a cold day.
A.Higher
B.Lower
C.The same
D.Unpredictable
Download the worksheet for Gas Exchange in Humans - Breathing and lung function to practice offline. It includes additional chapter-level practice questions.