Chemoreception in Organisms — Chapter Summary
Kerala Board · Class 10 · Biology
Summary of Chemoreception in Organisms for Kerala Board Class 10 Biology. Part of the Kerala Board Class 10 Biology syllabus.
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Overview
Chemoreception is the process by which organisms detect, respond to, and utilize chemical signals to control various life processes. This chapter explores how both plants and animals use chemical messengers - hormones and pheromones - to coordinate growth, development, metabolism, reproduction, and
Key Concepts
Dutch botanist F
Dutch botanist F.W. Went discovered auxin by cutting oat coleoptiles and placing them on agar blocks. When these agar blocks were placed on cut plant
Hormones function by binding to specific
Hormones function by binding to specific receptors on target cells. Only cells with appropriate receptors can respond to a particular hormone. The hor
Five main plant hormones control different
Five main plant hormones control different processes: Auxins promote stem elongation and root formation; Gibberellins break seed dormancy and promote
Plants respond to day and night
Plants respond to day and night length (photoperiod) through a light-sensitive pigment called phytochrome. This protein, found in leaves, detects ligh
The thyroid gland produces thyroxine (controls
The thyroid gland produces thyroxine (controls metabolism and growth) and calcitonin (regulates blood calcium). Thyroxine deficiency causes hypothyroi
Learning Objectives
- Understand the discovery and significance of plant hormones through F.W. Went's experiment
- Learn about different plant hormones and their roles in growth, development, and responses
- Explore the mechanism of hormone action and target cell concept
- Study major human hormones and their functions in metabolism, growth, and homeostasis
- Analyze hormone regulation mechanisms and feedback systems
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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