Unit 2: Form and Function
Topic 2.6: Gas Exchange Questions
Practice 20 exam-style questions for IB Biology Topic 2.6. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Identify1 mark
Besides the diaphragm, which muscle group contracts to cause inspiration?
Markscheme and model answer locked
Unlock Question2Identify1 mark
Which volume can NEVER be read from a spirometer trace?
Markscheme and model answer locked
Unlock Question3State1 mark
• Aimnova practice
State the name of the muscle group, other than the diaphragm, whose contraction causes inspiration.
Markscheme and model answer locked
Unlock Question4Identify1 mark
In a person with emphysema, what happens to the alveoli in the lungs?
Markscheme and model answer locked
Unlock Question5State1 mark
• Aimnova practice
State the name of the pore in a leaf surface through which gases enter and leave the leaf.
Markscheme and model answer locked
Unlock Question6Identify1 mark
Through which structures do carbon dioxide and oxygen enter and leave a leaf?
Markscheme and model answer locked
Unlock Question7Identify1 mark
Which alveolar cell secretes surfactant?
Markscheme and model answer locked
Unlock Question8Identify1 mark
By what process do oxygen and carbon dioxide cross the gas-exchange surface in the lungs?
Markscheme and model answer locked
Unlock Question9State1 mark
• Aimnova practice
State the process by which oxygen and carbon dioxide cross the gas-exchange surface in the lungs.
Markscheme and model answer locked
Unlock Question10Identify1 mark
What causes the thorax (chest) to expand during inspiration?
Markscheme and model answer locked
Unlock Question11State1 mark
• Aimnova practice
State the direct effect that the destruction of alveolar walls in emphysema has on the lung's capacity for gas exchange.
Markscheme and model answer locked
Unlock Question12Identify1 mark
Which of these is the main cause of emphysema?
Markscheme and model answer locked
Unlock Question13State1 mark
• Aimnova practice
State one function of a one-way valve in the breathing circuit of a spirometer.
Markscheme and model answer locked
Unlock Question14Identify1 mark
On the spirometer trace below, which reading is the tidal volume?
[Diagram: bio-spirometer]
Markscheme and model answer locked
Unlock Question15Identify1 mark
What happens to the diaphragm when a person breathes out at rest?
Markscheme and model answer locked
Unlock Question16Identify1 mark
Which two cells control the opening and closing of a stoma?
Markscheme and model answer locked
Unlock Question17Identify1 mark
At a gas-exchange surface in a mammalian lung, in which directions do oxygen and carbon dioxide move?
Markscheme and model answer locked
Unlock Question18Identify1 mark
Which feature of a HEALTHY alveolus allows fast gas exchange and is lost in emphysema?
Markscheme and model answer locked
Unlock Question19Identify1 mark
In which structure of the mammalian lung does gas exchange between air and blood take place?
Markscheme and model answer locked
Unlock Question20Identify1 mark
Which statement correctly describes the role of the waxy cuticle in a leaf?
Markscheme and model answer locked
Unlock QuestionReady to practice Topic 2.6?
Get instant AI feedback on your answers, view detailed markschemes, and track your progress across all IB Biology topics.