IB Biology HL 3.3.2 Negative feedback loops Question Bank
Practise IB Biology HL 3.3.2 by analysing feedback pathways that detect and reverse deviations from a set point.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Analyse sensor, control and effector links in a negative-feedback pathway.
- Evaluate how feedback responses restore a variable toward its set point.
D3.3.2—Negative feedback loops question 1
The diagram shows a feedback pathway.
Which sequence is an example of the pathway?
I
II
III
high blood sugar
alpha cells
secretion of insulin
low blood sugar
alpha cells
secretion of glucagon
high blood sugar
beta cells
secretion of glucagon
low blood sugar
beta cells
secretion of insulin
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