| Date | May 2021 | Marks available | 1 | Reference code | 21M.1.HL:.tz0.39 |
| Level | Higher Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 39 | Adapted from | N/A |
Question
What is a function of the immune system?
A. To sustain increased levels of cortisol
B. To lower leucocyte numbers
C. To increase levels of adrenaline
D. To protect the body against pathogens
Markscheme
D
Examiners report
Easiest question on the paper (99.48 % correctly answered).
