UNIT

3 The interaction function

Natural Science 2. Secondary Education

THE INTERACTION FUNCTION PROCESSES

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

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

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