Biology A-Level
Stable internal environment
What Stable internal environment means in Biology A-Level, as defined for OCR.
Definition of Stable internal environment
Check what you remember
Read the wording for your board, then hide it and explain Stable internal environment in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The maintenance of conditions within narrow limits despite changes in the external environment.
Topics that use Stable internal environment
- Communication and homeostasis (OCR A-Level)
Related terms
- cell specialisation
- Local versus long-distance signalling
- Negative feedback pathway
- Nervous and endocrine coordination
- Optimal conditions for cell function
- Surface area to volume ratio and diffusion limits
- Target cell response
- Thermoregulation in ectotherms
Using Stable internal environment in the exam
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