REFLEXES 0.0 / 5 ? BiologyREFLEXESIGCSEEdexcel Created by: francescakgCreated on: 20-04-17 19:46 REFLEX ARC ORDER Stimulus - Receptor - Sensory neurone - Relay neurone - Motor neurone - Effector - Response 1 of 7 REFLEX Automatic response to stimuli - eg: bright light = pupils get smaller. Route = REFLEX ARC 2 of 7 RECEPTORS Receptors in the SENSE ORGANS (eyes, ears, nose, tongue, skin) are cells which DETECT EXTERNAL STIMULI 3 of 7 EFFECTORS RESPONSE to STIMULI. (muscle cells in glands) 4 of 7 RECEPTORS COMMUNICATE RESPONSE to stimuli vis NERVOUS SYSTEM/HORMONAL SYSTEM 5 of 7 CENTRAL NERVOUS SYSTEM Co-ordinates information. Made up of neurones (nerve cells). Consists of Brain & Spinal chord. Uses high speed electrical impulses. 6 of 7 SYNAPSE Gap between 2 neurones = SYNAPSE. Information passed through synapse using CHEMICALS 7 of 7
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