We'll what I would do is is take and examine each one of the following:

genes, hormones and nervous system

and then take each one of these:

learning, personality, memory, motivation, emotions, coping tech., and other traits and abilities

and just think for example how our genes work in conjunction with learning. Like if your parents and grandparents had PHD's or more than that, Im sure somehow that gene will come into your body and learning might be easier for you then it was for them.

your hormones work with your personality..meaning if you have a hormone count is high, you might have a wild personality..

(just examples im giving - i dont even know if this stuff is true im writing)

But its something to get started on by..