The document describes the interaction function process in 3 steps: 1) A bird's visual (light) and auditory (chirping) signals are captured by a cat's sensory organs. 2) The sensory organs send this information to the cat's central nervous system. 3) The central nervous system processes the information and sends a signal to the cat's muscles to respond by trying to catch the bird.

1. UNIT
3
The interaction function
Natural Science 2. Secondary Education
THE INTERACTION
FUNCTION PROCESSES

2. UNIT
3
The interaction function processes
1: Light makes a
bird visible to the
cat. The bird also
emits sound
vibrations
(chirping).
2: The visual and
acoustic signals
reach the cat’s
sensory organs.
3: The sensory organs
send the information
they receive to the
central nervous system.
• First, the receptor organs of living things capture information
and send signals to the processing centres.
Natural Science 2. Secondary Education

3. 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).
• Then, the coordination centres process the signals from the
receptors and prepare a response.
UNIT
3
The interaction function processes
Natural Science 2. Secondary Education

4. 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.
• Finally, the effectors receive the signals from the coordination
centres and carry out the response.
UNIT
3
The interaction function processes
Natural Science 2. Secondary Education