Biology · Grades 9–12
Homeostasis and negative feedback · Revision sheet
Describe regulation as a dynamic process, not a perfectly fixed value.
Learn the idea
Homeostasis
Internal conditions are regulated within workable ranges despite changes.
Feedback
Negative feedback tends to counter a deviation from a regulated state.
Pathway
A simple control model includes a sensor, a coordinating process and an effector.
Limits
Feedback models simplify physiology and are not diagnostic tools.
Explain without looking
- Why should a thermostat analogy not be treated as a complete model of human physiology?
- Why is a classroom blood-glucose example not a personal medical instruction?
Further reading and review references
- openstax.org · reference 1
- www.genome.gov · reference 2
- www.genome.gov · reference 3
- www.genome.gov · reference 4
- www.genome.gov · reference 5
- www.genome.gov · reference 6
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Independent educational review required. Grade bands are approximate; these are not officially aligned curricula.