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.
In prolonged exhausting work, fat in the muscles can also be used for energy, and as a consequence the muscles become leaner. agonistic muscle one opposed in action by another muscle, the antagonistic muscle. Called also agonist. antagonistic muscle one that counteracts the action of another (the agonistic muscle).eltoid muscle the muscular cap of the shoulder, often used as a site for an intramuscular injection. See appendix 3-4. extraocular m's the six voluntary muscles that move the eyeball: superior, inferior, middle, and lateral recti, and superior and inferior oblique muscles.