enzyme同hormone...

enzyme is protein. it juz likes a factory , 佢可以將d raw material 整野一舊野, or可以將一舊野整鬼爛佢....佢係行動組既.....

hormone 係signal 來既...佢會經血帶到去佢target到,target feel 到佢來左,就會有反應,做d hormone 想佢做既野.....

hormone 可以係steroid , 可以係protein....

hormone 係個messager ....將腦既信息帶比target....我比個example 你ya ~~

出好多汗, 比kidney sense 到條友唔夠水-->話比個腦知-->腦分析-->叫posterior pituitary出多d ADH ( hormone )-->ADH 經血到kidney 叫佢做多d water reabsorption->water is reserved( 唔痾甘多走 )-------> yeahyeahyeah~~~

hormone 既target 可以係一個cell , 起上面既example , ADH 既target 就係kidney 里面distal tubule or collecting duct 既epithelial cell la....adh 令lee d cell reaborb more water....
hormone 既target 都可以係其他野, 可以係enzyme....