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(单词翻译:双击或拖选)
Abductors - muscle taking a limb or the jaw1 away from the body.
Acetyl choline - Aneurotransmitter substance found at all cholinergic synapses2 including those of motoneurones at the neuromuscular junction3.
Acini - the secreting4 units of a gland5. Each acinus is a sack-like structure, lined by secreting cells. The sack opens out into a tubule.
Acute necrotising ulcerative gingivitis -abbreviated to ANUG- a painful and destructive infection of the gingiva caused by a shift in the normal balance of bacteria in the gingival sulcus, in which fusobacteria and spirochaetes become dominant6.
Adapt- to modify in response to change. When used in regard to evolution, it means that some structure or behaviour of an organism may over time, appear to change in response toa new threat or opportunity in the environment. The bacterium7 which causes tuberculosis8 has developed certain strains which have adapted to the antibiotics9 used to treat the disease which is now becoming more difficult to treat.
Adductors - muscle bringing a limb or the jaw towards the body.
Adhesion - to form a chemical bond of attachment10 between two surfaces (see Ligand and lectin).
Adrenalin - see epinephrine.
Aerobic11 respiration12 -a type of respiration which requires oxygen and in which glucose13 is broken down to release energy in a series of steps. The end products are carbon dioxide and water. Step 1;glucose is broken down to pyruvic acid in the cell cylasm with the release of 4 hydrogen atoms. Step 2; pyruvic acid is oxidised to acetylcoenzyme A (acetyl CoA), with the release of 4 further hydrogen atoms. Step 3; In the KREB cycle, 16 atoms of hydrogen are released. At all stages the hydrogen atoms are used to form the high energy molecule15 adenosine triphospate (ATP) via the electron transport system . See also Anaerobic16 respiration .
Affected17 dentine - dentine which has been demineralised by acids in advance of invading caries bacteria. A distinction is made between affected dentine and infected dentine, because affected dentine is able to remineralise and should not be removed during cavity preparation.
Aggregate18 - clumps19 or collections of small particles or bacteria .
Alkaline phosphatase - an enzyme14 which removes phosphate groups from organic compounds at an alkaline pH. It is found in high concentrations in matrix vesicles which are about to form new bone mineral. Alkaline phosphatase activity is a good indicator20 of bone formation.
Alveolar bone - bone which develops around the roots of the teeth to hold them firmly in place. See gomphosis. If the teeth are extracted, the alveolar bone resorbs away. Alveolar bone consists of both trabecula and cortical types of bone.
1 jaw | |
n.颚,颌,说教,流言蜚语;v.喋喋不休,教训 | |
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2 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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3 junction | |
n.连接,接合;交叉点,接合处,枢纽站 | |
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4 secreting | |
v.(尤指动物或植物器官)分泌( secrete的现在分词 );隐匿,隐藏 | |
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5 gland | |
n.腺体,(机)密封压盖,填料盖 | |
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6 dominant | |
adj.支配的,统治的;占优势的;显性的;n.主因,要素,主要的人(或物);显性基因 | |
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7 bacterium | |
n.(pl.)bacteria 细菌 | |
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8 tuberculosis | |
n.结核病,肺结核 | |
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9 antibiotics | |
n.(用作复数)抗生素;(用作单数)抗生物质的研究;抗生素,抗菌素( antibiotic的名词复数 ) | |
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10 attachment | |
n.附属物,附件;依恋;依附 | |
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11 aerobic | |
adj.需氧的,增氧健身法的,有氧的 | |
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12 respiration | |
n.呼吸作用;一次呼吸;植物光合作用 | |
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13 glucose | |
n.葡萄糖 | |
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14 enzyme | |
n.酵素,酶 | |
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15 molecule | |
n.分子,克分子 | |
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16 anaerobic | |
adj.厌氧的 | |
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17 affected | |
adj.不自然的,假装的 | |
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18 aggregate | |
adj.总计的,集合的;n.总数;v.合计;集合 | |
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19 clumps | |
n.(树、灌木、植物等的)丛、簇( clump的名词复数 );(土、泥等)团;块;笨重的脚步声v.(树、灌木、植物等的)丛、簇( clump的第三人称单数 );(土、泥等)团;块;笨重的脚步声 | |
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20 indicator | |
n.指标;指示物,指示者;指示器 | |
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