Responding To The Environment 2.0 / 5 based on 1 rating ? BiologyHuman, animal and plant behaviourA2/A-levelEdexcel Created by: MiracleCreated on: 01-03-13 12:06 Stimulus - Dim light firstly the stimulus is a dim light 1 of 5 Receptors - Photo receptors photo receptors found in the eyes, detect the lack of light 2 of 5 CNS CNS prcosess the information 3 of 5 Effectors Radial muscles in the iris are stimulated by motor nureons 4 of 5 Response Radial muscle contracts to dilate your pupils, i.e make them bigger. 5 of 5
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