Important Role of Phenylalanine in Central Nervous System Responses

I need an explanation for this Biology question to help me study.

 

you should anaylyze the essays of any two of your classmates and comment on any new information you may have gleaned from his/her work, address any omissions or inaccuracies you observe and ask for clarifications on any unclear areas in the person’s essay.

attached 1st post and ( two samples of the responses )

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