IB Biology SL 3.3.2 Negative feedback loops Question Bank
Practise IB Biology SL 3.3.2 by identifying how negative feedback reverses a change and helps maintain stability.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Identify a negative-feedback sequence in which the response reduces the original change.
- Explain how feedback pathways help maintain stable internal conditions.
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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