hei my friend, check out a book called BIOLOGY!!
dont be lazy..

btw, negative feedback is your body try to turn itself back to normal..eg..when its hot, u sweat to cool your body

positive feedback--turn itself not back to its normal state..turn to an abnormal state...eg..childbirth...body temp drop (not normal), or.... fever...your body heated up to make the defence mechanism to be more active,thus killing the pathogen(bacteria,virus....)..

hope u understand...

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Added on January 17, 2009, 1:48 pmif you are good...den no nid le...juz do wad the teacher tell you to do cukup d...reali...dont waste too much time on it...

This post has been edited by chokchunynh: Jan 17 2009, 01:48 PM

any of u here are waiting for your SPM results??

i read in the star..it say the end of 2nd week of march..so the latest is at 12th...i dont think it will be released at 13th..neither on the 14th..it is a Saturday..