What to look for in a prenatal vitamin. Prenatal vitamins are available by both over-the-counter and by prescription. Although formulations can vary from brand to brand, these are the most important vitamins and minerals to look for:
Muscle pairs. Antagonistic pairs of muscles create movement when one (the prime mover) contracts and the other (the antagonist) relaxes. Examples of antagonistic pairs working are: 1  the quadriceps and hamstrings in the leg.2  the biceps and triceps in the arm.uscle pairs. Antagonistic pairs of muscles create movement when one (the prime mover) contracts and the other (the antagonist) relaxes. Examples of antagonistic pairs working are: 1  the quadriceps and hamstrings in the leg.
Noun. 1. 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 muscle that relaxes while another contracts; when bending the elbow the triceps are the antagonist. physiology-the branch of the biological sciences dealing with the functioning of organisms.oun. 1. 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.