anteriordelts andtriceps
Agonist
The primary agonist muscle in a lateral dumbbell raise is the deltoid, specifically the lateral (side) head of the deltoid. The antagonist muscle is the latissimus dorsi, which performs the opposite movement by extending the shoulder while the deltoid is lifting the dumbbell.
Antagonist: lats Agonist: Abdominals
Antagonist
The Buprenorphine opioid is classified as a partial agonist antagonist.
The Trapezius muscles are involved in upward rotation of the scapula. However Trapezius is agonist/antagonist to itself as the upper portion elevates the scapula, the middle portion adducts the scapula and the lower portion depresses the scapula, while all parts are involved in upward rotation of the scapula. The Serratus Anterior assists in rotating the scapula (glenoid fossa) upward, (which would make it a synergist with the trapezius). The Serratus Anterior is antagonist to the upper and middle portions of Trapezius, so we are back to the agonist /antagonist relationship of the traps. That's about all I can contribute to this question.
Drugs can act as agonist or antagonist to regulate a process or function of cellular/chemical process.
Agonist - Pectoralis Major, Triceps Brachii Antagonist - Bicep Brachii, Latissimus Dorsi
Morphine
L-dopa is a precursor that is converted to dopamine in the brain. It is not an agonist or antagonist itself, but once converted to dopamine, it acts as an agonist on dopamine receptors.
gluteus maximus
in the arm: bicep contracts (agonist) triceps relax (antagonist) in the leg: hamstrings contract (agonist) quadriceps relaxes (antagonist) remember the agonist is the muscle "agonising" to do the work - like pulling the joint.