Question 22
Question 22 of 40
Question image for Q22
You can solve this MCQ to see its answer, but your attempt won't be logged unless you login
No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
11. Gas exchange in human...
11.1. Gas exchange in humans

Describe the differences in composition between inspired and expired air, limited to: oxygen, carbon dioxide and water vapour

13. Excretion in humans
13.1. Excretion in humans

State that carbon dioxide is excreted through the lungs

20. Human influences on e...
20.3. Pollution

Describe the sources and effects of pollution of the air by methane and carbon dioxide, limited to: the enhanced greenhouse effect and climate change