Respiratory Muscles: Diaphragm Anatomy and Function
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Respiratory Muscles: Diaphragm Anatomy and Function

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Questions and Answers

Which muscle constitutes the bulk of the tongue mass?

  • Genioglossus (correct)
  • Superior Pharyngeal Constrictor
  • Tensor Veli Palatini
  • Palatoglossal

    • What muscle is responsible for elevating the larynx and pharynx during swallowing and speaking?

  • Salpingopharyngeus
  • Lateral Cricoarytenoid
  • Thyroepiglottic Muscle
  • Stylopharyngeus (correct)

    • Which muscle is the only infrahyoid muscle that elevates the larynx?

  • Thyrohyoid (correct)
  • Omohyoid
  • Sternohyoid
  • Sternothyroid

    • What muscle is replaced by a smooth muscle sheet that fills posterior gaps of the trachea?

    <p>Trachealis Muscle</p> Signup and view all the answers

    Which muscle is responsible for widening/abducting the glottis?

    <p>Posterior Cricoarytenoid</p> Signup and view all the answers

    What muscle contracts to narrow/adduct the glottis?

    <p>Lateral Cricoarytenoid</p> Signup and view all the answers

    Which muscle overlaps the Superior Pharyngeus and Middle Pharyngeus muscles?

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

    What muscle is responsible for relaxing to allow the soft palate to occlude the airway?

    <p>Tensor Veli Palatini</p> Signup and view all the answers

    Which muscle is located at C6 and functions as the esophageal sphincter?

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

    What muscle is responsible for opening the oropharynx?

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

    Which muscle contracts to widen the inlet of the larynx?

    <p>Thyroepiglottic Muscle</p> Signup and view all the answers

    What muscle is responsible for narrowing the inlet of the larynx?

    <p>Aryepiglottic Oblique Muscle</p> Signup and view all the answers

    What is the primary muscle responsible for inspiration?

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

    From which vertebrae do the crura of the diaphragm originate?

    <p>Lumbar vertebrae</p> Signup and view all the answers

    What causes the dome of the diaphragm to rise as high as the level of the 4th intercostal space at rest?

    <p>Recoil of lungs after expiration</p> Signup and view all the answers

    Which muscle can assist in inspiration by elevating the rib cage?

    <p>Serratus anterior</p> Signup and view all the answers

    Which nerve descends vertically on the anterior scalene muscle?

    <p>Phrenic nerve</p> Signup and view all the answers

    Which muscle depresses the ribs facilitating active expiration?

    <p>Internal intercostal muscles</p> Signup and view all the answers

    What causes the dome of the diaphragm to descend 2 spaces bilaterally when contracted?

    <p>Contraction of abdominal muscles</p> Signup and view all the answers

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