Anatomy & Physiology › Section A · Introduction to the human body › Topic A.3
Homeostasis
Your temperature, blood sugar and blood acidity barely shift whether you are asleep, sprinting or sitting in the snow. That steadiness is homeostasis, and the feedback loops that produce it are the single most useful idea in physiology.
In this topic
- Steady, not fixed
- Normal ranges in practice
- Parts of a feedback loop
- Worked example: a hot afternoon
- Responses to cold
- Blood glucose: two hormones in balance
- Positive feedback
- Worked example: which kind of feedback?
- When homeostasis fails
- Common mistakes to avoid
- Key takeaways
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