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Created by Matty Hudson
over 10 years ago
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Stimulus- delectable change in internal or external environment
Stimuli detected by Receptors
Receptors transform the energy of the stimuli into a form of energy that can be processed by the organism
A response is carried out by the effector
Stimulus ----- Receptor ------ Coordinator ------ Effector ------ Response (CNS)
Taxes
Taxis- response direction determined by direction of stimulus
Organisms responds by moving towards favorable stimulus and away from unfavorable (Positive Taxis) (Negative Taxis)
e.g. Earthworms move away from light (Negative phototaxis)
Kineses
Organisms does not move towards or away from stimulus
The more unpleasant the stimulus, the more rapidly it moves and changes direction
The goal is to bring the organisms back into favorable conditions
e.g. woodlice move more rapidly in dry conditions in order to prevent water loss
Tropisms
Plant movement in response to a directional stimulus
e.g. plant shoots grow towards sun
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