Ritz argued that the engrossed copy of the Declaration was signed by Congress on July 4, as Jefferson, Adams, and Franklin had stated, and that it was implausible that all three men had been mistaken. Ritz believed that McKean's testimony was questionable, and that historians had misinterpreted the July 19 resolution.
The seven general types of skeletal muscle. The origin of a muscle is the bone, typically proximal, which has greater mass and is more stable during a contraction than a muscle's insertion. For example, with the latissimus dorsi muscle, the origin site is the torso, and the insertion is the arm.
There are more than a dozen muscles that maneuver the hip through extension and flexion. But rather than all the hip muscles firing at once to both extend and flex the hip, the muscles that contract in flexion, during which the extensors relax, are relaxed during extension while the extensors contract.Flexion occurs when the angle between articulating bones decreases, like when you flex your biceps.ut rather than all the hip muscles firing at once to both extend and flex the hip, the muscles that contract in flexion, during which the extensors relax, are relaxed during extension while the extensors contract.