What is Homeostasis?
aligned to Igcse Biology 14.4
Learning Objective
I can define homeostasis and explain its importance for maintaining stable internal conditions.
Lesson Flow
Watch Video
Homeostasis and Negative/Positive Feedback
Amoeba Sisters
Guided Notes
Key concepts students will learn:
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Homeostasis is the state of balance in the body, ensuring that conditions like blood pH, blood glucose, and internal body temperature remain within a certain range.
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In negative feedback, a variable triggers a counteracting response to return to a set point, while in positive feedback, the variable is intensified instead of counteracted.
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An example of positive feedback is the birth of a human baby, where pressure on the cervix leads to more hormone release and stronger uterine contractions.
Practice
7 questions • Multiple choice & Short answer
Exit Ticket
“Define homeostasis in your own words and explain why it is important for your body to maintain stable internal conditions.”
Teacher Guide
Get the complete package:
- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
