The Nervous system Biology Unit 1 0.0 / 5 ? BiologyThe Nervios systemGCSEAQA Created by: Elliej-23Created on: 24-01-16 12:28 What is a neurone? A neurone is a specilised cell that transmits nerve impulses. 1 of 17 What is a synapse? A junction between two nerve cells consisting of a small gap across which a chemical impulse is defused accross. 2 of 17 What is an effector? An organ or cell that scts in resonse to a stimulus. 3 of 17 What does a sensory neurone do? Carries signals from receptors to the spinal chord and brain, CNS? 4 of 17 What is the brain? An organ of soft nervous tissue contained in the skull functioning as the coordinating centre. The brain recieves signals from neurones. 5 of 17 What is the spinal chord? A cylindrical bundle of nerve fibres and tissue that connects nearly all parts of the body to the brain. 6 of 17 What is a stimulus? A change in the environment of an organism. 7 of 17 What is an impulse? The movement of an action along a nerve fibre in response to a stimulus. 8 of 17 What does a relay neuron do? Carrie messages from one part of the CNS to another. 9 of 17 What does a motor neurone do? Carries signals from the CNS to the effector. 10 of 17 What does the word flex mean? To bend somthing, e.g an arm or leg using a muscle. 11 of 17 What are the ear canals? A passage of bone and skin leading to the eardrum. 12 of 17 What is the deffinition of temperature? How hot or cold something is. 13 of 17 What is the definition of pressure? A constant force on an object or part of the body. 14 of 17 What is the definition of the word chemicals? A compound or substance. 15 of 17 What are taste buds? Part of the tongue's taste receptors. 16 of 17 Describe the pathway of a reflex action. Receptor - sensory neurone - synapse - relay neurone - synapse - motor neurone - effector(Muscle or gland) 17 of 17
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