Respiratory Muscles: Diaphragm and Muscle Movement
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Questions and Answers

Which muscle constitutes the bulk of the tongue mass?

  • Genioglossus (correct)
  • Tensor Veli Palatini
  • Palatoglossal
  • Levator Veli Palatini
  • Which muscle tenses the soft palate and opens the nasopharynx?

  • Palatoglossal
  • Levator Veli Palatini
  • Palatopharyngeus
  • Tensor Veli Palatini (correct)
  • Which muscle contracts and depresses the hyoid bone and larynx?

  • Sternothyroid (correct)
  • Stylopharyngeus
  • Omohyoid
  • Stylohyoid
  • Which muscle is the only infrahyoid muscle that elevates the larynx?

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

    Which muscle narrows the laryngeal inlet?

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

    Which muscle elongates the vocal cords and serves as the main tensor?

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

    Which muscle is the sole abductor of the vocal cords?

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

    Which muscle adducts the vocal folds?

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

    Which muscle is the primary muscle of inspiration?

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

    From how many lumbar vertebrae do the crura of the diaphragm originate?

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

    At rest, to which level can the dome of the diaphragm rise?

    <p>4th intercostal space</p> Signup and view all the answers

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

    <p>Middle Scalene</p> Signup and view all the answers

    Which muscle layer of the thoracic wall depresses the ribs facilitating active expiration?

    <p>Deep Intercostal Muscle Layer</p> Signup and view all the answers

    What primarily causes the diaphragm to move higher into the thoracic cavity after expiration?

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

    Which muscle fibers primarily pull upon the central tendon of the diaphragm when they concentrically contract?

    <p>Sternal part fibers</p> Signup and view all the answers

    Which muscles are embryologically derived from two separate hemi-diaphragms that fuse during gestation?

    <p>'Sternal part' fibers</p> Signup and view all the answers

    'Internal Intercostal Muscles' primarily resist paradoxical movement during which process?

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

    Which muscle assists in inspiration by elevating the first and second ribs?

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

    What is the structure that lies on the superior side of diaphragm to which the central tendon is connected?

    <p>Pericardial sac</p> Signup and view all the answers

    The Tensor Veli Palatini muscle relaxes to allow the soft palate to occlude the airway.

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

    The Stylopharyngeus muscle shortens and widens the larynx and pharynx during swallowing and speaking.

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

    The Thyrohyoid muscle is an infrahyoid muscle that depresses the larynx.

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

    The Cricothyroid muscle primarily shortens the vocal cords.

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

    The Lateral Cricoarytenoid muscle primarily widens or abducts the glottis.

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

    The Interarytenoid muscles adduct the arytenoid cartilages.

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

    The Trachealis muscle is replaced by smooth muscle sheet that fills posterior gaps of the trachea.

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

    Contraction of the airway smooth muscle produces airway dilation.

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

    The Inferior Pharyngeal Constrictor muscle overlaps the Middle Pharyngeal Constrictor.

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

    The Genioglossus muscle primarily closes the oropharynx.

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

    The Uvular muscles tense or elevate the soft palate.

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

    The Superior Pharyngeal Constrictor muscle primarily circles the pharyngeal wall and constricts it during swallowing.

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

    The right hemi-diaphragm is normally slightly lower than the left. (True/False)?

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

    The central tendon is the structure that the diaphragm's muscle fibers primarily push upon when they concentrically contract. (True/False)?

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

    The dome of the diaphragm may rise as high as the level of the 5th intercostal space at rest. (True/False)?

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

    The diaphragm does not return to its normal resting position after expiration. (True/False)?

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

    The external intercostal muscles primarily resist paradoxical movement during inspiration. (True/False)?

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

    The middle intercostal muscles primarily resist paradoxical movement during inspiration. (True/False)?

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

    The deep intercostal muscle layer of the thoracic wall primarily depresses the ribs facilitating active inspiration. (True/False)?

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

    The subcostal muscles cross two intercostal spaces. (True/False)?

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

    The pectoralis major and minor are accessory muscles of respiration in the neck. (True/False)?

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

    The sternocleidomastoid can assist in inspiration by depressing the rib cage. (True/False)?

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

    The anterior scalene attaches to the cervical transverse processes at the second and third ribs. (True/False)?

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

    The superficial intercostal muscles can maintain eupnea if the diaphragm is unable. (True/False)?

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

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