![]() False Which criterion is used in naming the muscles identified here? direction of muscle fibers The biceps brachii is a muscle that is named for its _. The prime mover is also known as the antagonist. ![]() ![]() True What is the functional relationship between the brachialis and the biceps brachii? synergistic A synergist muscle can do all of the following except reverse a particular movement caused by the prime mover. False A lever system operating at a mechanical advantage can move a large load a short distance with a small amount of effort. True Third-class lever systems, like most skeletal muscles, enable great strength but sacrifice speed and distance of movement. Second The elbow joint is an example of a fulcrum as the biceps brachii flexes the forearm. third The gastrocnemius operates in a _-class lever system. The biceps brachii operates in a _-class lever system. Which type of fascicle arrangement shortens the least? bipennate Concerning levers, which of the following is true? In a second-class lever, the load is located between the fulcrum and the point of application of effort. The arrangement of muscle fascicles in a sphincter is circular. parallel When muscle fascicles are arranged in concentric rings this arrangement is referred to as circular. circular The long axes of the fascicles run parallel to the long axis of the muscle is a description of this type of fascicle arrangement. parallel An example of a muscle with this type of fascicle arrangement is the orbicularis oris. convergent This arrangement of fascicles tends to provide the greatest range of motion (shortening distance), though not the greatest power. In addition to the Pectoralis major, another muscle that displays this pattern of fascicle arrangement is Latissimus dorsi. bipennate A muscle with fascicles that insert into only one side of the tendon is categorized as unipennate. convergent The rectus femoris demonstrates this type of muscle fascicle arrangement. The Pectoralis major is an example of a muscle with this type of muscle fascicle arrangement. This arrangement of muscle fascicles tends to be triangular in shape. locating the position of the 2nd rib Which muscle is used to smile? zygomaticus (major and minor) Which fascicle arrangement produces the more powerful contraction? multipennate The muscle fascicle arrangement for Orbicularis oris is best characterized as circular. Paralysis of which muscle(s) would make a person unable to flex the leg at the knee? gastrocnemius and hamstrings What is the area of insertion for serratus anterior? Vertebral border of scapula Onto which structure do the three layers of the abdominal muscles insert? Linea alba Which muscle forms the anterior border of the axilla? Pectoralis major The sternal angle is a reference point for _. True The thenar eminence is located at the base of the thumb. pronation and supination The hamstrings consist of the biceps femoris, the semitendinosus, and the semimembranosus. flexion and extension Movement of the forearm includes _. glenohumeral joint All the tendons of the rotator cuff muscles combine at which location? humeral head Movement of the elbow joint movement is limited to _. thigh The rotator cuff is a term used to describe the group of muscles and tendons that stabilize and reinforce the _. deep and superficial layers Muscles that act on the knee joint form most of the mass of the _. The forearm muscles can be divided into anterior flexors and posterior extensors, as well as _. distribution and functional relationships Which of the following groups of muscles are not muscles of the shoulder? the anterior flexor muscles Why are the muscles that move the fingers and wrist located in the forearm? This design allows the hand to maintain fine motor control and strength without the interference of bulky muscles. power precision Which joint is considered the most flexible joint in the body? the shoulder joint Muscles of the shoulder can be divided into groups based on _. radial tuberosity Which of the following is not true of the deep fascia of the leg? an insertion for the majority of lower leg muscles The ball and socket joint in the hip is similar to the ball and socket joint of the shoulder but is designed more for _ than _. False The two heads of the biceps brachii combine to insert on the _. In anatomical position, the pronator teres, the brachioradialis, and the extensor carpi radialis all lie on the anterior surface of the forearm. A prime mover for leg extension at the knee is the rectus femoris. A prime mover for lateral rotation at the shoulder is the teres minor.
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