Biology A-Level
Homeostasis
What Homeostasis means in Biology A-Level, as defined for OCR.
Definition of Homeostasis
Check what you remember
Read the wording for your board, then hide it and explain Homeostasis in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Coordinated communication allows the maintenance of a stable internal environment despite external change.
Topics that use Homeostasis
- 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 Homeostasis in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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