Question 21
Question 21 of 40
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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
10. Diseases and immunity
10.1. Diseases and immunity

Describe the body defences, limited to: skin, hairs in the nose, mucus, stomach acid and white blood cells

11. Gas exchange in human...
11.1. Gas exchange in humans

Explain the role of goblet cells, mucus and ciliated cells in protecting the breathing system from pathogens and particles