单词	myelin
释义	myelin /ˈmʌɪəlɪn / noun [mass noun] Anatomy & Physiology A mixture of proteins and phospholipids forming a whitish insulating sheath around many nerve fibres, which increases the speed at which impulses are conducted.It turns out that the bacterium that causes leprosy directly damages a protective sheathing, made of the protein myelin, around many nerve cells.... They then manipulated them in the laboratory to turn them into specialised cells that form myelin, the insulating layer than surrounds nerve fibres. For example, multiple sclerosis involves the progressive destruction of the myelin that insulates neural axons. Derivatives myelinated adjective ... Their content of myelinated nerve fibers indicates their origin as branches of the pelvic colonic innervation. It also preserved many of the myelinated nerve fibers in treated animals, compared to untreated rats and those that did not receive the triple combination, the researchers found. The incompletely myelinated frontal lobes of children only gradually join the grid of electrical activity that operates the brain. myelination /mʌɪəlɪˈneɪʃ(ə)n/ noun ... Other innovations in this group of animals include an adaptive immune system similar to that of humans, a closed and pressurized circulatory system, and myelination of the nervous system. Hence, neuronal circuitry and myelination are disrupted. Next are areas related to memory, then to spatial orientation and to comprehension of language and then we see myelination in language areas. Origin Late 19th century: from Greek muelos 'marrow' + -in1.
随便看	arduous arduously arduousness are area area bishop area board area bombardment area bombing area code area dean area denial areal a real live —— area manager area navigation Area of Outstanding Natural Beauty area rug area rule area-ruled area shoot area sneak area study areaway area-wide

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