Upper respiratory tract anatomy

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Questions and Answers

The respiratory portion of the respiratory tract extends from which structure to the alveoli?

  • Terminal bronchioles (correct)
  • Pharynx
  • Larynx
  • Paranasal sinuses

Which of the following is NOT part of the upper respiratory tract?

  • Nose and nasal cavities
  • Paranasal sinuses
  • Pharynx
  • Alveoli (correct)

The upper respiratory tract lies partly in the skull due to the presence of which structure?

  • Terminal bronchioles
  • Middle ear (correct)
  • Pharynx
  • Alveolar sacs

How many regions are there in each nasal cavity?

<p>3 (B)</p> Signup and view all the answers

Which cranial nerve transmits through the perforations in the cribriform plate?

<p>CN I (A)</p> Signup and view all the answers

What are the posterior openings of the nasal cavities called?

<p>Choanae (C)</p> Signup and view all the answers

Where do the posterior openings of the nasal cavities lead into?

<p>Nasopharynx (A)</p> Signup and view all the answers

What are the anterior openings of the nasal cavities called?

<p>Nares (D)</p> Signup and view all the answers

What forms the floor of the nasal cavities?

<p>Maxillary and palatine bone (C)</p> Signup and view all the answers

What forms the roof of the nasal cavities?

<p>Frontal and nasal bone (D)</p> Signup and view all the answers

Which structure in the roof of the nasal cavities contains perforations for the olfactory nerves?

<p>Cribriform plate (C)</p> Signup and view all the answers

What are the curled shelves of bone in the nasal cavities called?

<p>Turbinates (A)</p> Signup and view all the answers

How many nasal conchae are present in the nasal cavities?

<p>3 (C)</p> Signup and view all the answers

Which conchae is located superiorly in the nasal cavities?

<p>Superior nasal conchae (A)</p> Signup and view all the answers

How many air channels/meatuses do the conchae create in the nasal cavities?

<p>4 (D)</p> Signup and view all the answers

Which of the following is NOT a function of the conchae or turbinates?

<p>Swallowing foreign material caught by nasal hairs (D)</p> Signup and view all the answers

What is the purpose of the conchae and meatuses in the nasal cavity?

<p>To improve filtration, heating, and humidification of inspired air (C)</p> Signup and view all the answers

Which type of epithelium is found in the conchae and nasal cavities?

<p>Pseudostratified ciliated columnar epithelium (B)</p> Signup and view all the answers

What effect does the internal nasal anatomy have on inspired air and odorants?

<p>It pushes them to the olfactory area (D)</p> Signup and view all the answers

What are the functions of the paranasal air sinuses?

<p>Protect vital structures in facial trauma (C)</p> Signup and view all the answers

Where are the paranasal sinuses located?

<p>Within the bones of the skull (B)</p> Signup and view all the answers

What type of epithelium lines the paranasal sinuses?

<p>Ciliated, columnar, mucous secreting respiratory epithelium (D)</p> Signup and view all the answers

How does the mucosa of the paranasal air sinuses compare to the mucosa of the nasal cavity?

<p>The mucosa of the sinuses is thinner and less vascular (A)</p> Signup and view all the answers

What is a disadvantage of the respiratory epithelium lining the paranasal sinuses?

<p>It promotes the spread of infections from the nasal cavity (B)</p> Signup and view all the answers

Which anatomical structures are closely related to the paranasal air sinuses?

<p>Orbits and meninges (C)</p> Signup and view all the answers

What are the linings of the brain called?

<p>Meninges (B)</p> Signup and view all the answers

Which of the following conditions can result from infection spreading to the brain or meninges?

<p>Meningitis (C)</p> Signup and view all the answers

The trigeminal nerve (CN V) has how many major divisions?

<p>3 (C)</p> Signup and view all the answers

Which cranial nerve is responsible for the sensory supply to the nasal cavities and sinuses?

<p>Trigeminal nerve (CN V) (A)</p> Signup and view all the answers

Which division of the trigeminal nerve provides sensory supply to the upper part of the face?

<p>Ophthalmic (CN V1) (A)</p> Signup and view all the answers

The sensory supply to the frontal sinuses is primarily provided by which division of the trigeminal nerve?

<p>Ophthalmic (CN V1) (A)</p> Signup and view all the answers

Which divisions of the trigeminal nerve supply the ethmoidal and sphenoidal sinuses and nasal cavity?

<p>Ophthalmic (CN V1) and Maxillary (CN V2) (D)</p> Signup and view all the answers

The maxillary sinuses are primarily supplied by which division of the trigeminal nerve?

<p>Maxillary (CN V2) (B)</p> Signup and view all the answers

What are the possible causes of sinusitis?

<p>Both viral and bacterial infections (D)</p> Signup and view all the answers

Sinusitis refers to the inflammation of which structures?

<p>Lining of the nasal cavity and the sinuses (A)</p> Signup and view all the answers

Which of the following can result from sinusitis?

<p>Orofacial pain, headache, and toothache (C)</p> Signup and view all the answers

Which of the following is a symptom of sinusitis?

<p>Nasal blockage and congestion (C)</p> Signup and view all the answers

Which division of the trigeminal nerve (CN V) is responsible for the forehead pain and headache associated with frontal sinusitis?

<p>Ophthalmic (CN V1) division (B)</p> Signup and view all the answers

Dental pain can be experienced with acute maxillary sinusitis due to compression/irritation of which division of the trigeminal nerve (CN V)?

<p>Maxillary (CN V2) division (A)</p> Signup and view all the answers

Which part of the nasal cavity is a common site for nosebleeds?

<p>Cartilaginous nasal septum (D)</p> Signup and view all the answers

What is the name of the anastomotic plexus of small arteries on the anterior part of the cartilaginous nasal septum?

<p>Kiesselbach's plexus (A)</p> Signup and view all the answers

How do all the sinuses drain into the nasal cavity?

<p>Assisted gravity (C)</p> Signup and view all the answers

Which sinuses are more prone to infections due to impaired drainage?

<p>Maxillary sinuses (C)</p> Signup and view all the answers

What can happen when the drainage system is impaired?

<p>All of the above (D)</p> Signup and view all the answers

Which part of the pharynx allows the nasal cavities and the middle ear to open into it?

<p>Nasopharynx (A)</p> Signup and view all the answers

During swallowing, what happens to the pharynx?

<p>It becomes a food channel (B)</p> Signup and view all the answers

Which part of the pharynx opens into the laryngeal inlet?

<p>Laryngopharynx (C)</p> Signup and view all the answers

How is the nasopharynx closed?

<p>By lifting of the soft palate (A)</p> Signup and view all the answers

How many external circular constrictor muscles are there in the pharynx?

<p>3 (C)</p> Signup and view all the answers

Which type of muscles are the muscles of the pharynx?

<p>Voluntary smooth muscles (D)</p> Signup and view all the answers

Which muscles are classified as internal longitudinal elevators in the pharynx?

<p>Salpingopharyngeus, Palatopharyngeus, and Inferior (D)</p> Signup and view all the answers

Which cranial nerve supplies most of the pharyngeal muscles?

<p>CN X (Vagus) (D)</p> Signup and view all the answers

Which cranial nerve supplies the Stylopharyngeus muscle?

<p>CN IX (Glossopharyngeal) (C)</p> Signup and view all the answers

Which space lies behind the pharynx and can result in airway occlusion?

<p>Retropharyngeal space (C)</p> Signup and view all the answers

What lymphoid tissue enlargement can occlude the nasopharynx in children?

<p>Pharyngeal tonsils (D)</p> Signup and view all the answers

What structure forms the anterior surface of the oropharynx?

<p>Posterior tongue (D)</p> Signup and view all the answers

The nasopharynx becomes the oropharynx at which structure?

<p>Pharyngeal isthmus (B)</p> Signup and view all the answers

What marks the start of the laryngopharynx?

<p>Epiglottis (C)</p> Signup and view all the answers

Which tonsils are located in the oropharynx?

<p>Palatine tonsils (A)</p> Signup and view all the answers

The laryngeal inlet opens into which part of the pharynx?

<p>Laryngopharynx (D)</p> Signup and view all the answers

What can the floor of the nasopharynx (soft palate) do?

<p>Elevate and depress (A)</p> Signup and view all the answers

Which cranial nerve supplies the motor innervation to the pharynx?

<p>Vagus nerve (CN X) (C)</p> Signup and view all the answers

Which cranial nerve provides sensory innervation to the nasopharynx?

<p>Glossopharyngeal nerve (CN IX)</p> Signup and view all the answers

The maxillary division of the Trigeminal nerve (CN V) contributes to the sensory supply of which region of the pharynx?

<p>Nasopharynx (A)</p> Signup and view all the answers

Which muscle is innervated by the Glossopharyngeal nerve (CN IX) in the oropharynx?

<p>Stylopharyngeus muscle (A)</p> Signup and view all the answers

Which cranial nerves provide sensory innervation to the laryngopharynx?

<p>Glossopharyngeal nerve (CN IX) and Vagus nerve (CN X) (D)</p> Signup and view all the answers

What type of epithelium lines the larynx?

<p>Pseudostratified ciliated columnar respiratory epithelium (C)</p> Signup and view all the answers

How does the larynx move during swallowing?

<p>It moves up and down under the action of extrinsic muscles (C)</p> Signup and view all the answers

Where does the larynx extend from and to?

<p>From the tongue (C3 vertebral level) to the trachea (C6 vertebra) (A)</p> Signup and view all the answers

What is the function of the larynx?

<p>All of the above (D)</p> Signup and view all the answers

The rima glottidis can be opened and closed to:

<p>Protect the airway (C)</p> Signup and view all the answers

How can the true vocal folds be manipulated to produce sound?

<p>Contracting and relaxing the intrinsic muscles of the larynx (B)</p> Signup and view all the answers

The vocal ligaments extend from the vocal process of the _______ to the _______ cartilage.

<p>Arytenoid cartilage; thyroid (B)</p> Signup and view all the answers

What type of epithelial tissue covers the vocal ligaments?

<p>Non-keratinized stratified squamous epithelium (D)</p> Signup and view all the answers

The true vocal folds are formed by the mucosa covering the underlying:

<p>Vocal ligaments (C)</p> Signup and view all the answers

Which muscle is responsible for opening the glottis?

<p>Posterior cricoarytenoids (A)</p> Signup and view all the answers

Paralysis of the posterior cricoarytenoids can lead to:

<p>Asphyxiation (B)</p> Signup and view all the answers

The main function of the posterior cricoarytenoids is to:

<p>Abduct the vocal folds (C)</p> Signup and view all the answers

The posterior cricoarytenoids are intrinsic muscles of the:

<p>Larynx (A)</p> Signup and view all the answers

The cricothyroid muscle is supplied by which branch of the vagus nerve?

<p>Superior laryngeal branch (C)</p> Signup and view all the answers

Which nerve supplies the intrinsic muscles of the larynx, except for the cricothyroid muscle?

<p>Recurrent laryngeal branch of the vagus nerve (CN X) (D)</p> Signup and view all the answers

On the right side, which artery does the right recurrent laryngeal branch of the vagus nerve arch over?

<p>Subclavian artery (A)</p> Signup and view all the answers

On the left side, which structure does the left recurrent laryngeal branch of the vagus nerve loop over?

<p>Aortic arch (C)</p> Signup and view all the answers

What is the principal biological function of the larynx?

<p>To control and prevent the entry of foreign bodies into the airways (B)</p> Signup and view all the answers

Which body part does the larynx primarily regulate during ventilation?

<p>Trachea (C)</p> Signup and view all the answers

What is the role of the larynx as a sphincter?

<p>It controls the entry of foreign bodies into the airways (C)</p> Signup and view all the answers

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