Practice IB Biology Topic 6.4 Gas Exchange with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for 6.4 Gas Exchange and mirrors Paper 1A, 1B, 2 style where relevant.
Get instant solutions, detailed explanations, and build confidence with questions aligned to IB examiner expectations.
All organisms take in and also release carbon compounds. Draw a labelled diagram of the carbon cycle.
Describe how the rate of photosynthesis can be measured.
Explain the mechanism of ventilation in humans.
During expiration, how does air pressure in the lungs compare with atmospheric pressure?
What change occurs to the pressure and volume of the lungs when the external intercostal muscles contract?
What conditions are necessary for air to be exhaled from the lungs?
State when PAN was injected into the rats.
Outline the treatment given to the control group.
Distinguish between the treatment received by the PAN only group and the PAN + early edaravone group.
State the increase in protein in the urine of rats treated with PAN only between day 6 and day 9.
Compare the levels of protein during the experiment in the urine of rats treated using PAN only with those treated using PAN + early edaravone.
Evaluate whether the results support the hypothesis that a continuous dose of edaravone is better than the same drug administered over shorter periods.