[问答题,简答题] 降钙素对骨的作用是什么?

何谓胆素原? 舌癌好发部位是() ["A．舌背","B．舌腹","C．舌根","D．舌尖","E．舌侧缘"] 何谓脱氧吡啶酚和吡啶酚? 癌变概率最大的癌前病变是() ["A．白斑","B．红斑","C．扁平苔藓","D．扁平疣","E．慢性溃疡"] 肾小管和集合管功能检测试验有哪些? 降钙素对骨的作用是什么?