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 set of features characterizes an efficient gas exchange surface?
A.Small surface area, thick walls, and dry surface
B.Large surface area, thin walls, and moist surface
C.Large surface area, thick walls, and moist surface
D.Small surface area, thin walls, and dry surface
- 2.
By which process does oxygen move from the air inside the alveoli into the blood in the capillaries?
A.Active transport
B.Osmosis
C.Diffusion
D.Facilitated diffusion
- 3.
What is the main reason why the walls of the alveoli are only one cell thick?
A.To provide a large surface area for gas absorption
B.To decrease the distance over which diffusion occurs
C.To prevent the lungs from collapsing during inhalation
D.To allow the movement of mucus into the blood
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.
What is the specific role of goblet cells in the human respiratory system?
A.Moving mucus up towards the throat
B.Increasing the surface area for diffusion
C.Carrying oxygen in the blood
D.Secreting mucus to trap dust and bacteria
- 2.
Compared to inspired air, expired air contains a lower percentage of which gas?
A.Oxygen ()
B.Carbon dioxide ()
C.Nitrogen ()
D.Water vapour ()
- 3.
Which structure represents the final destination of inhaled air where gas exchange occurs?
A.Bronchi
B.Bronchioles
C.Alveoli
D.Larynx
Download the worksheet for Gas Exchange in Humans - Breathing and lung function to practice offline. It includes additional chapter-level practice questions.