[問題] 關於泌乳素
【問題】：
Prolactin(催乳激素.泌乳激素) stimulates mammary gland growth in mammals,
regulate fat metabolism in bird, and regulates salt and water balance in
freshwater fish.Many scientists believe that this wide gange of functions
indicates
A.prolactin is an ancient hormone.
B.prolactin is derived from different sources.
C.prolactin is a nonspecific hormone.
D.prolactin interacts with many different receptor molecules.
【問題起因】：
一樣
【個人看法】：
B應該是錯的.
我覺得是D....
A好像也可能
查過課本跟網路了
還是沒啥頭緒
請各位幫忙
謝謝
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