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koala423 koala423
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6 years ago
The boys end up being adopted by different families. Tom, the brother who lives in a large city, is diagnosed with attention deficit hyperactivity disorder (ADHD). Tests were done and it was discovered that the level of ______________ in his blood was twice the levels found in the general population. The doctors are convinced this is the cause of his disorder.
 
  a. amino acids
 b. glucose
 c. mercury
 d. neurotransmitters
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virpal j.virpal j.
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6 years ago
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koala423 Author
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6 years ago
Thanks for your help!!
SlimyPencil
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This helped my grade so much Perfect
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This site is awesome
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