Homeostasis — Chapter Summary
Telangana Open School (TOSS) · Class 12 · Biology
Summary of Homeostasis for Telangana Open School (TOSS) Class 12 Biology. Key concepts: Homeostasis refers, It is the process by and Endotherms.
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Overview
Homeostasis is the body's ability to maintain a stable internal environment despite changes in external conditions. This chapter explores how living organisms, especially humans, regulate internal factors like temperature, water balance, and chemical concentrations to ensure optimal cell function. A
Key Concepts
Homeostasis refers to the maintenance
Homeostasis refers to the maintenance of a stable internal environment in the body. It ensures that conditions such as temperature, pH, water content,
It is the process by
It is the process by which the body maintains a constant core temperature (around 37°C). This involves balancing heat production and heat loss through
Endotherms (like birds and mammals) generate
Endotherms (like birds and mammals) generate internal heat to maintain body temperature, while ectotherms (like frogs and lizards) depend on external
A regulatory system where any deviation
A regulatory system where any deviation from the set point triggers a response that reverses the change. For example, if body temperature rises, sweat
Every homeostatic process involves four components
Every homeostatic process involves four components: a set point (normal value), sensors (detect changes), an integrating centre (processes information
Learning Objectives
- Explain the term thermoregulation and justify its need in the body.
- Differentiate between endotherms and ectotherms.
- List the body parts involved in thermoregulation and explain how they contribute to heat production and heat loss.
- Name the principal heat-regulating centre in the body and describe how it functions.
- Explain the term 'feedback' and differentiate between positive and negative feedback mechanisms.
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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