Biology - The nervous system the nervous system 3.5 / 5 based on 2 ratings ? BiologyNervous system, hormones and behaviourGCSEAll boards Created by: AliceCreated on: 27-05-11 17:54 What does the nervous system do? Where is this process usually controlled? What are reflex actions responses to? What are receptors? What can they detect? Where are the receptors located? 1 of 10 The nervous system allows us to respond to changes in the environment The brain Stimuli They are a group of specialised cells Changes in the environment, called stimuli and changes them into electrical pulses Sense organs e.g. eyes, skin 2 of 10 What is skin sensitive to? What is the tongue sensitive to? What are eyes sensitive to? What are the ears sensitive to? What does the CNS stand for? What does the CNS consist of? 3 of 10 Touch, pressure, pain Chemicals in the air Light The sound and position of the head The central nerve system The brain and the spinal chord 4 of 10 What happens when a receptor is stimulated? What does the brain then do? What is an effector? Name 2 examples of effectors: What are neurones? How to neurones transmit information? 5 of 10 It will send a signal along the nerve cells to the neurones to the brain The brain then co-ordinates the response An effector is any part of the body that produces the response 1: A muscle contracting to move the arm 2: A gland releasing a hormone into the gland Nerve cells Through tiny electrical signals 6 of 10 Name the three different types of neurones? What do the sensory neurones do? What do the relay neurones do? What do the motor neurones do? 7 of 10 1: Sensory neurone 2: Relay neurone 3: Motor neurone The carry the signals from the receptors to the spinal cord and brain This carries signals from one part of the CNS to the other This carries the signals from the CNS to the effectors 8 of 10 What is the name of the tiny gap where to neurones meet? What happens when a receptor is stimulated? When is the brain not needed for a response? 9 of 10 Synapses It sends a signal to the central nervous system When a quick response is needed 10 of 10
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