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Biology Essay

QUESTION 2 - VARIOUS MECHANISMS USED BY THE NERVOUS SYSTEM TO GUIDE AXONAL GROWTH
At the leading end of the growth cone, actin is polymerized and then moved to the rear for depolymerisation (Bean 2012). This continuous cycling of polymerised actin from the leading end to the rear end and then back to the leading end leads to a “tank-tread” kind of movement that enables the guiding of the growth cone (Bean 2012).Santiago Ramón y Cajal first described the movement of growth cones in 1880 (Zheng 2000; Bean 2012). He described that growth cones move towards their synaptic
Pages: 4 (1000 words), Essay
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Questions AAA
Hence free radicals are not always harmful. They do serve for useful purpose in the human body (Bahorun, et al.As individual age, their arteries begin to harden and get narrow naturally, which leads to atherosclerosis (Castillo-Richmond, et al. However there are number of factors such as alcohol, family history, ethnicity and air pollution that accelerate this process. However the important factors that may cause atherosclerosis are described below in detail:Cholesterol is a kind of fat that is
Pages: 6 (1500 words), Essay
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