Biology Unit 1

The Nervous System

Sense Organs Detect Stimuli

• A stimulus is a change in your enviroment, You may react to this (such as standing on a pin) You need to be aware of whats going on around you, so you can respond if you need to.
• You have 5 different sense organs, eyes,ears,nose,tongue and skin
• They all contain differnt Receptors, Receptors are groups of cells which are sensitive to a stimulus. The change the stimulus energy. (light engergy in…