IB Biology SL D3.3.2 Negative Feedback Loops Questions
Explain how negative feedback detects a deviation from a set point and reverses it through receptors, coordinators and effectors.
- 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 return a variable toward its set point and maintain stable internal conditions.
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IB Biology SL D3.3.2 Negative Feedback Loops Questions 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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