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Anatomy & Physiology Muscle and Movement Review

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  • What is unique to the muscles of facial expression?
    They only insert onto the facial bones.
  • What helps an agonist muscle work?
    A fixator helps an agonist muscle work.
  • What happens during flexion?
    The bone moves toward the center of the body and the angle between bones decreases.
  • Which structure moves the least during muscle contraction?
    The joints move the least during muscle contraction.
  • Which muscle has a convergent pattern of fascicles?
    The gluteus maximus has a convergent fascicle pattern.
  • What fascicle arrangement runs along the long axis of the muscle?
    A rectus fascicle arrangement runs along the long axis.
  • How is a bipennate muscle arranged?
    Muscle fibers feed in on an angle to a long tendon from both sides.
  • What can the location of a muscle’s origin and insertion determine?
    It can determine the force of contraction and muscle name.
  • Where is the temporalis muscle located?
    The temporalis muscle is located on the forehead.
  • Which muscle name does not make sense?
    None of the given names are incorrect; all are valid muscle names.
  • Which term describes a muscle that moves the leg away from the body?
    An abductor moves the leg away from the body.
  • What is a prime mover in head flexion?
    The occipitofrontalis is a prime mover in head flexion.
  • Where is the inferior oblique muscle located?
    The inferior oblique muscle is located in the face.
  • What is the action of the masseter muscle?
    The masseter is responsible for closing the jaw.
  • What suffix do extrinsic tongue muscles commonly have?
    They commonly end in -hyoid.
  • What is the function of the erector spinae muscles?
    They are responsible for rotating the vertebral column and extending the spine.
  • Which abdominal muscle is not part of the anterior abdominal wall?
    The interior oblique is not part of the anterior abdominal wall.
  • Which muscle pair plays a role in respiration?
    The intertransversarii and interspinales muscles assist in respiration.
  • What is the linea alba?
    A long band of collagen fibers that runs down the midline of the abdomen.
  • The rhomboid major and minor muscles are deep to which structure?
    They are deep to the ligamentum nuchae.
  • Which muscle extends the forearm?
    The triceps brachii extends the forearm. (Note: biceps brachii and brachialis flex the forearm.)
  • What is the origin of the wrist flexors?
    The wrist flexors originate at the medial epicondyle of the humerus.
  • Which muscles stabilize the pectoral girdle?
    The axial and scapular muscles stabilize the pectoral girdle.
  • Which large muscle group attaches the leg to the pelvic girdle and extends the hip?
    The abductor group produces hip extension.
  • Which muscle allows you to cross your legs?
    The gracilis muscle produces movement to cross the legs.
  • What is the largest muscle in the lower leg?
    The soleus is the largest muscle in the lower leg.
  • The vastus intermedius muscle is deep to which muscle?
    It is deep to the rectus femoris muscle.