Sean outperforms the other air traffic controllers, accurately detecting three times as many potential airplane space violations. which neurotransmitter may be present at higher levels in sean's brain?

In the given case, acetylcholine and norepinephrine are the neurotransmitters that may be present at the greater concentrations.  

Norepinephrine refers to a neurotransmitter, which is essential for emotions, attentiveness, dreaming, sleeping, and learning. It is also discharged as a hormone in the bloodstream, where it enhances the rate of heart and makes the blood vessels to contract.  

Another neurotransmitter known as acetylcholine refers to the chemical, which the motor neurons of the nervous system discharge to stimulate the muscles.  

the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.