Biology - The Nervous System

The Nervous System

Definitions:

·         Stimulus: a change in your environment that you may need to react to. E.g. light, sound, pressure, touch, chemical, change in position or temperature.

·         Sense organs: the different organs you need to sense! E.g. eyes, ears, nose, tongue and skin.

·         Receptors: groups of cells that are sensitive to a stimulus, and change stimulus energy (for example, light energy) into electrical impulses.

·         Sensory Neurones: the nerve cells that carry signals (electrical impulses) from the receptors in the sense organs…