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Biology
Topic 15
Sensory reception
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Created by
Jayden Clauer
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Effectors
are a range of cells/tissues/organs that carry out a response
Stimuli
are detectable changes in the
internal
or
external
environment
Receptors
are cells/organs that detect
specific
stimuli
Kinesis
is a random non-directional response to an unpleasant stimuli
A
coordinator
is an intermediary between a receptor and effectors which formulates a suitable response to a stimulus
Taxis
is a directional response to a stimuli
Basic sequence of a response arc
stimulus
->
receptor
->
coordinator
->
effector
-> response
The
direction
of
taxis
is determined by the direction of the
stimuli
.
Positive
taxis is towards a stimulus,
negative
taxis is away from a stimulus