3.5.3

Coordinated Responses

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Coordinated responses

Control systems in animals use both nervous and chemical responses. Control systems in plants are coordinated by plant hormones. Coordinated responses are made up of three components:

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Stimulus

  • A stimulus is a change in environmental conditions that brings about a response.
    • Sunlight and temperature are examples of stimuli.
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Receptor

  • Receptor cells detect stimuli.
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Effector

  • Effectors (e.g. muscles or glands) carry out responses to stimuli that help to restore optimum levels.

Jump to other topics

1The Nature & Variety of Living Organisms

2Structure & Functions in Living Organisms

3Organism Functions

3.1Respiration

3.2Gas Exchange

3.3Transport

3.4Excretion

3.5Coordination & Response

4Reproduction & Inheritance

5Ecology

6Biological Resources

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