Dr. Jackson is a life long resident of McNairy County. A graduate of McNairy Central High School, Dr. Jackson taught at Adamsville High School before he was named Principal in 1999. Dr. Jackson leads our schools as the Supervisor of Instruction.
antagonistic muscle - (physiology) a muscle that opposes the action of another; the biceps and triceps are antagonistic muscles. muscle, musculus-one of the contractile organs of the body. agonist-a muscle that contracts while another relaxes; when bending the elbow the biceps are the agonist.
antagonist: a compound that blocks or inhibits the action of a neurotransmitter. direct-acting antagonist (aka receptor blocker): binds to the same receptor population as an agonist but fails to activate the target receptors.