Edexcel IGCSE Biology · Spec 2.80-2.82
Homeostasis
What homeostasis is, the stimulus-receptor-effector-response pathway, and negative feedback.
Biology revision video
Homeostasis
Prefer to watch on YouTube? Open this video on YouTube.
Spec 2.80-2.82
What you need to know
- Explain what homeostasis is
- Describe the stimulus-response pathway
- Explain negative feedback
Active recall
Quick check
Answer each question before opening the answer.
Define homeostasis.
The maintenance of a constant internal environment in the body.
What is negative feedback?
A control mechanism where a change from the set point is detected and corrected back towards it.
Biology video companion
Keep your notes and exam practice together
The free Biology workbook follows every video in specification order.