本试验所用动物为ＳＤ雌性大鼠 ,有机磷农药染毒后观察乳腺细胞的增生和变异。研究目的是测定有机磷农药是否能导致大鼠乳腺恶性病变以及判定此改变是否影响胆碱能活性增加。此外 ,还研究毒扁豆碱、对硫磷、马拉硫磷诱发乳腺癌的可能 ,以及是否能被阿托品阻断。具体的研究方法 The animals used in this experiment were SD female rats. The proliferation and variation of mammary gland cells were observed after exposure to organophosphorus pesticides. The purpose of the study was to determine whether organophosphorus pesticides can cause mammary gland malignancy in rats and whether the change is determined to affect the increase in cholinergic activity. In addition, physostigmine, parathion, and malathion-induced breast cancer are also studied and whether it can be blocked by atropine. Specific research methods