UNCG Bio 271 Exam 2 Questions and Verified Answers

Origin - less movable point of attachment Insertion - more movable point of attachment Agonist - muscle contacting during movement antagonist - relaxes during joint movement linea alba - connective tissue running from xiphoid process to pubic symphasis insertion to origin - typically what direction does a muscle move? Supraspinatus, infraspinatus, teres minor, subscapularis - rotator cuff (SITS) flexors - palm side flexors or extenders? extenders - back of hand side flexors or extenders? synchondrosis - articulation where bones are joined by hyaline cartilage eversion - soles turn out inversion - soles turn in diarthrosis - joint with free movement synarthrosis - joint with no movement amphiarthrosis - joint with little movement syndesmoses - joint with broad ligament sheet called an interosseous membrane Z line - holds together thin filaments M line - holds together thick filaments epimysium - covers the entire skeletal muscle perimysium - covers the muscle fasicle endomysium - covers each muscle cell sacroplasm - cytoplasm of a muscle cell