Skip to main content
Super TutorResources
Chapter 39 of 41
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Revision Notes

Homeostasis

Telangana Open School (TOSS) · Class 12 · Biology

Quick revision notes for Homeostasis — Telangana Open School (TOSS) Class 12 Biology. Key concepts, formulas, and definitions for last-minute revision.

44 questions30 flashcards5 concepts

Interactive on Super Tutor

Studying Homeostasis? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

1,000+ Class 12 students started this chapter today

Key Topics to Revise

1

Concept of Homeostasis

  • Homeostasis means 'maintaining a steady state' in the body.
  • It ensures internal conditions like temperature, pH, water, and sugar levels remain stable.
  • Examples include regulating water balance, blood sugar, pH, red blood cell count, and body temperature.
2

Thermoregulation and Its Importance

  • Thermoregulation is the control of body temperature.
  • Enzymes work best between 35–40°C; outside this range, they become inactive or denatured.
  • Above 45°C: enzymes are destroyed, proteins denature, and cells may die.
3

Endotherms vs Ectotherms

  • Endotherms (e.g., birds, mammals) generate internal heat to maintain body temperature.
  • Ectotherms (e.g., frogs, fish, lizards) depend on external sources for body heat.
  • Endotherms are also called warm-blooded or homeotherms.
4

Mechanism of Thermoregulation in Humans

  • The hypothalamus acts as the body's thermostat.
  • It receives input from temperature sensors in the skin and blood.
  • When body temperature drops: vasoconstriction, shivering, and postural changes reduce heat loss and increase heat production.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

Homeostasis refers to the maintenanceIt is the process byEndotherms (like birds and mammals) generateA regulatory system where any deviationEvery homeostatic process involves four components

Frequently Asked Questions

What are the important topics in Homeostasis for Telangana Open School (TOSS) Class 12 Biology?
Homeostasis covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Homeostasis — Telangana Open School (TOSS) Class 12 Biology?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Homeostasis

All 41 chapters — Telangana Open School (TOSS) Class 12 Biology Revision Notes

For serious students

Get the full Homeostasis chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for Telangana Open School (TOSS) Class 12 Biology.

Try Super Tutor Free
Try the full chapter — Free