Muscle Functions Quiz
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Questions and Answers

What type of muscle assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts?

  • a prime mover
  • an antagonist
  • an agonist
  • a synergist (correct)
  • Which of the following best describes the orbicularis oris?

  • It closes the eye.
  • It draws the eyebrows together.
  • It closes, purses, and protrudes the lips. (correct)
  • It pulls the lower lip down and back.
  • Which of the following muscles serves as a common intramuscular injection site, particularly in infants as the buttocks and arm muscles are poorly developed?

  • the vastus medialis
  • the vastus lateralis (correct)
  • rectus femoris
  • the vastus intermedius
  • A nursing infant develops a powerful sucking muscle that inserts to the muscle which adults also use for whistling (orbicularis oris). What is this muscle called?

    <p>buccinator</p> Signup and view all the answers

    What do the genioglossus, hyoglossus, and styloglossus muscles have in common?

    <p>All act on the tongue.</p> Signup and view all the answers

    The abnormal protrusion of the small intestine through a weak point in the muscle of the abdominal wall is called a ________.

    <p>hernia</p> Signup and view all the answers

    What is the muscle that usually provides the major force for producing a specific movement called?

    <p>An agonist (prime mover)</p> Signup and view all the answers

    Which muscle is NOT a member of the hamstrings?

    <p>Gracilis</p> Signup and view all the answers

    What is the muscle that extends the great toe?

    <p>Extensor hallucis longus</p> Signup and view all the answers

    Which of the following functions is NOT performed by the external oblique muscles?

    <p>Extend vertebral column and head and rotates them to opposite sides</p> Signup and view all the answers

    What function do the suprahyoid muscles serve?

    <p>They depress the larynx and hyoid bone if the mandible is fixed.</p> Signup and view all the answers

    Tennis players often complain about pain in the arm that swings the racquet. Which muscle is usually strained under these conditions?

    <p>The brachioradialis</p> Signup and view all the answers

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