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(单词翻译:双击或拖选)
Sympathetic nerves - the sympathetic nervous system is one of he two main divisions of the autonomic nervous system. Sympathetic nerves make synapses3 at ganglia close to the spinal4 cord and have long post -ganglionic axons which, in general place the body on a state of alert. Always acts as a balance to activity of the parasympathetic nervous system.
Synapse2 - the point at which one nerve cell connects with another. The nerve impulse is transmitted by the release of chemical neurotransmitter substances from the pre-synaptic cell membrane5. The neurotransmitter substance diffuses6 across the synaptic cleft7 to the post-synaptic membrane which it depolarises. When the post-synaptic cell is sufficiently8 excited by a number of incoming impulses and enough neurotransmitter substance, it discharges an electrical impulse along its axon membrane to the next neurone.
Synovial fluid - the lubricating fluid containing glycosaminoglycans which is held in the capsule of a synovial joint9.
1 symbiosis | |
n.共生(关系),共栖 | |
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2 synapse | |
n.突触 | |
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3 synapses | |
n.(神经元的)突触( synapse的名词复数 );染色体结合( synapsis的名词复数 );联会;突触;(神经元的)触处 | |
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4 spinal | |
adj.针的,尖刺的,尖刺状突起的;adj.脊骨的,脊髓的 | |
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5 membrane | |
n.薄膜,膜皮,羊皮纸 | |
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6 diffuses | |
(使光)模糊,漫射,漫散( diffuse的第三人称单数 ); (使)扩散; (使)弥漫; (使)传播 | |
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7 cleft | |
n.裂缝;adj.裂开的 | |
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8 sufficiently | |
adv.足够地,充分地 | |
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9 joint | |
adj.联合的,共同的;n.关节,接合处;v.连接,贴合 | |
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