Response to Stimuli

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  • Created by: Molly
  • Created on: 07-03-14 13:13
What is a stimulus?
It is a detectable change in the internal or external environment of an organism that produces a response in the organism.
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What is a receptor?
Receptors detect stimuli then transform the energy of the stimulus into a form of energy that can be processed by the organism and that leads to a response.
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Which 3 cells can carry out a response?
Tissues, organs, systems.
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What are tissues, organs and systems?
They are effectors.
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What is the method of communication between receptors and effectors?
Hormones.
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What is the chain in the response to stimuli?
Stimulus --> Receptor --> Co-ordinator --> Effector --> Response.
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What is taxes?
A simple response whose direction is determined by the direction of the stimulus. An organism responds directly to environmental changes by either moving towards a favourable stimulus or away from an unfavourable one.
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What is kinesis?
When an organism finds a stimulus unpleasant and so it rapidly and randomly changes direction.
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What is tropism?
A growth movement of part of a plant in response to a directional stimulus. The plant grows towards the positive stimulus and away from the negative stimulus.
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Card 2

Front

What is a receptor?

Back

Receptors detect stimuli then transform the energy of the stimulus into a form of energy that can be processed by the organism and that leads to a response.

Card 3

Front

Which 3 cells can carry out a response?

Back

Preview of the front of card 3

Card 4

Front

What are tissues, organs and systems?

Back

Preview of the front of card 4

Card 5

Front

What is the method of communication between receptors and effectors?

Back

Preview of the front of card 5
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