...introduced Caenorhabditis elegans (C. elegans) as a model organism for developmental biology and the study of the nervous system. A model organism is an animal model with certain characteristics that make it easy to use. Dr. Brenner found that C. elegans meets a certain set of criteria that make it a model organism. Such as having a rapid life cycle, a simple reproductive cycle, and small in size and easily observed phenotypic characteristics. Within three years this model organism was used to discover more than 300 mutations caused by mutagens [1]. 39 years later Dr. Brenner won the Nobel Prize in physiology or medicine for his work with C. elegans. Since its introduction by Dr. Brenner this organism has...
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...Edexcel GCE Biology Advanced Unit 5: Energy, Exercise and Coordination June 2010 Scientific Article for use with Question 7 Do not return the Insert with the question paper. Paper Reference 6BI05/01 Turn over N37096A ©2010 Edexcel Limited. 1/1/1/1/1/ *N37096A* Scientific Article for use with Question 7 It’s All in the Mind The link between the brain as a physical organ and what we feel in our conscious mind has long been the subject of research, particularly where we appear to be unable to control aspects of mood or behaviour and where normal life is affected. Stress, pain and depression can be explained in terms of nerve impulses and brain chemistry, and the causes of Parkinson’s disease are well understood, but finding reliable ways of correcting problems has proved elusive. Understanding more about how the brain works may well lead to new methods for treating such problems. Dancing Worms and Deep Depression In a laboratory in Germany, a tiny worm dances to flashes of light. A flash of yellow and it darts forward. A flash of blue and it jerks back. Yellow, forward, blue, back – right on cue every time. The worm is not a toy or a robot but a living creature. It has been engineered so that its nerves and muscles can be controlled with light. With each flash of blue its neurons fire electric pulses, causing the muscles they control to clench. A flash of yellow stops the nerves firing, relaxing the worm’s muscles and lengthening its body once again. The worm is in the vanguard...
Words: 7091 - Pages: 29
...Edexcel GCE Biology Advanced Unit 5: Energy, Exercise and Coordination June 2010 Scientific Article for use with Question 7 Do not return the Insert with the question paper. Paper Reference 6BI05/01 Turn over N37096A ©2010 Edexcel Limited. 1/1/1/1/1/ *N37096A* Scientific Article for use with Question 7 It’s All in the Mind The link between the brain as a physical organ and what we feel in our conscious mind has long been the subject of research, particularly where we appear to be unable to control aspects of mood or behaviour and where normal life is affected. Stress, pain and depression can be explained in terms of nerve impulses and brain chemistry, and the causes of Parkinson’s disease are well understood, but finding reliable ways of correcting problems has proved elusive. Understanding more about how the brain works may well lead to new methods for treating such problems. Dancing Worms and Deep Depression In a laboratory in Germany, a tiny worm dances to flashes of light. A flash of yellow and it darts forward. A flash of blue and it jerks back. Yellow, forward, blue, back – right on cue every time. The worm is not a toy or a robot but a living creature. It has been engineered so that its nerves and muscles can be controlled with light. With each flash of blue its neurons fire electric pulses, causing the muscles they control to clench. A flash of yellow stops the nerves firing, relaxing the worm’s muscles and lengthening its body once again. The worm is...
Words: 7091 - Pages: 29