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单词 myelin
释义

Definition of myelin in English:

myelin

noun ˈmʌɪəlɪnˈmaɪələn
mass nounAnatomy 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.

    Example sentencesExamples
    • The neurologic symptoms are a result of destruction of myelin, though axons may also be affected.
    • 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.
    • They travel to the brain and mount an assault on a substance called myelin, which acts as a protective sheath around nerve fibers.

Derivatives

  • myelinated

  • adjective ˈmʌɪəlɪˌneɪtɪdˈmaɪələˌneɪdəd
    Physiology Anatomy
    • (of a nerve fibre) enclosed in a myelin sheath.

      the axons in the central nervous system are generally myelinated
      Example sentencesExamples
      • 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.
      • Their content of myelinated nerve fibers indicates their origin as branches of the pelvic colonic innervation.
      • The incompletely myelinated frontal lobes of children only gradually join the grid of electrical activity that operates the brain.
  • myelination

  • noun ˌmʌɪəlɪˈneɪʃ(ə)nˌmaɪələˈneɪʃ(ə)n
    Physiology Anatomy
    • Next are areas related to memory, then to spatial orientation and to comprehension of language and then we see myelination in language areas.
      Example sentencesExamples
      • 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.

Origin

Late 19th century: from Greek muelos 'marrow' + -in1.

 
 

Definition of myelin in US English:

myelin

nounˈmaɪələnˈmīələn
Anatomy Physiology
  • A mixture of proteins and phospholipids forming a whitish insulating sheath around many nerve fibers, increasing the speed at which impulses are conducted.

    Example sentencesExamples
    • For example, multiple sclerosis involves the progressive destruction of the myelin that insulates neural axons.
    • They travel to the brain and mount an assault on a substance called myelin, which acts as a protective sheath around nerve fibers.
    • 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.
    • The neurologic symptoms are a result of destruction of myelin, though axons may also be affected.

Origin

Late 19th century: from Greek muelos ‘marrow’ + -in.

 
 
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更新时间:2024/9/20 17:27:40