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CAIE A-Level Biology 14.1.2 Principles of Homeostatic Control

Practise tracing a stimulus through receptor, nervous or endocrine coordinator and effector, then explain how negative feedback opposes the original deviation.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • identify the stimulus and receptor that detects deviation from the normal range
  • trace nervous or hormonal coordination signals to target cells and effectors
  • explain how the effector response reduces the original change by negative feedback

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