63之38第7题

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skayouyou

楼主

发表于 2010-9-9 15:47:12 | 显示全部楼层

1.large injection of tryptophan-->serotonin increase(line9)

2.insulin定位，line19--whether insulin secretion similarly affect serotonin-->similar to tryptophan(line15可看出)--->line 25 As we hypothesized.......
serotonin果然increase了

所以，injection of tryptophan 和insulin有similar effect: 都能使 serotonin increase

所以选D,similar to tryptophan