UNIT
3
The interaction function
THE INTERACTION
FUNCTION PROCESSES
Natural Science 2. Secondary Education
UNIT
3
The interaction function processes
• First, the receptor organs of living things capture information
and send signals to the processing centres.
2: The visual and
acoustic signals
reach the cat’s
sensory organs.
1: Light makes a
bird visible to the
cat. The bird also
emits sound
vibrations
(chirping).
3: The sensory organs
send the information
they receive to the
central nervous system.
Natural Science 2. Secondary Education
UNIT
3
The interaction function processes
• Then, the coordination centres process the signals from the
receptors and prepare a response.
The central nervous
system processes the
information received
and produces a
suitable response
(there is a bird there
and I’m going to try
to catch it).
Natural Science 2. Secondary Education
UNIT
3
The interaction function processes
• Finally, the effectors receive the signals from the coordination
centres and carry out the response.
The cat’s muscles, part of
its locomotor system, receive
the order to respond and
carry out movements in
order to try to catch the prey.
Natural Science 2. Secondary Education