Gas Exchange in Humans
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Structure of gas exchange system
SubtopicStructure of gas exchange system under Gas Exchange in Humans for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
How does the short diffusion distance in the alveoli benefit gas exchange?
A.It slows down the rate of gas movement
B.It makes gas exchange faster
C.It prevents pathogens from entering the blood
D.It increases the pressure in the lungs
- 2.
What is the collective name for the structures that protect the lungs and heart?
A.The vertebral column
B.The pelvic girdle
C.The ribcage
D.The pectoral girdle
- 3.
Which of the following is true about the respiratory system?
A.The right lung has two lobes
B.The lungs contain muscle tissue to pump air
C.Gas exchange occurs in the bronchioles
D.Air is warmed and moistened in the nasal cavity
Download the worksheet for Gas Exchange in Humans - Structure of gas exchange system to practice offline. It includes additional chapter-level practice questions.
Breathing and ventilation
SubtopicBreathing and ventilation under Gas Exchange in Humans for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
In the human respiratory system, what are the smallest tubes that lead directly to the alveoli?
A.Bronchi
B.Trachea
C.Bronchioles
D.Larynx
- 2.
Which of these components of cigarette smoke is known to specifically damage or paralyze the cilia?
A.Nicotine
B.Carbon monoxide
C.Tar
D.Nitrogen
- 3.
What is the approximate percentage of carbon dioxide in inhaled air?
A.21%
B.16%
C.0.04%
D.4%
Download the worksheet for Gas Exchange in Humans - Breathing and ventilation to practice offline. It includes additional chapter-level practice questions.