1.The brain can only understand electrical signals 2.Receptors in the eyes change light into electrical signals 3.Receptors in the ears change sound into.

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Presentation transcript:

1.The brain can only understand electrical signals 2.Receptors in the eyes change light into electrical signals 3.Receptors in the ears change sound into electrical signals 4.The iris can change the size of the pupil depending on light intensity Sense Organs Sense organs

The Eye

Iris and Pupil

Vibrations to the Ear

The Ear

1.The nervous system transports electrical impulses from receptors to the central nervous system (brain and spinal cord) and then back to effectors 2.There are three types of neurone 3.The reflex arc allows us to make emergency decisions in less time The Nervous System

Receptor cells

Neurones Neurones

Neurones

The Nervous System

Reflex actions

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