视紫红质分解和合成的平衡点取决于() ["视蛋白的浓度","视黄醛的浓度","异构酶的活性","肝内维生素A储量","光照射的强度"]
分泌胆汁的细胞是() ["A.肝细胞","B.Kupffer细胞","C.NK细胞","D.贮脂细胞","E.肝血窦内皮细胞"]
暂空床的注意事项
按矿床成因分类,则岩浆矿床属于()。 ["岩浆分结矿床","伟晶岩床","内生矿床","外生矿床"]
色素上皮参与视紫红质光化学反应的主要环节是() ["生色基团与视蛋白的分离","生色基团与视蛋白的结合","视黄醛由顺型异构为全反型","视黄醛由全反型异构为顺型","以维生素A即时合成视紫红质"]
在什么情况下采用弯销抽芯机构?