Thursday, November 11, 2010

79 下列有關黑寡婦毒蜘蛛(Latrodectus mactans)之敘述,何者錯誤?
無論雄性或雌性黑寡婦毒蜘蛛都會叮咬人類,造成傷害
α-Latrotoxin是黑寡婦毒蜘蛛毒素的主要成分
Latrotoxin主要作用於neuromuscular junction,使乙醯膽鹼快速大量釋放,結果會引起肌肉過度去極化,造成肌肉痙攣
現已有抗毒血清,約在注射後10~20分鐘內便有顯著之效果

answer is A


The female black widow's venom is particularly harmful to humans (males almost never bite humans). The injection of venom from these species is a comparatively dangerous or lethal bite.

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