What this tests
Syllabus point 14.1 — Coordination and response, in Coordination and response. Difficulty easy (estimated from the question's demands, not a Cambridge rating).
Also set in
The same question, as Cambridge printed it in other papers.
Cambridge IGCSE Biology 0610 · 14.1 Coordination and response
June 2016 · Paper 22 · Question 23
One real Cambridge question from Coordination and response, with the official answer. Cambridge has printed this question 4 times.