21.
The functional units of the respiratory system, where gas exchange occurs are
A
the pulmonary alveoli.
B
the pleurae.
C
the lungs.
D
the pulmonary vessels.
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The functional units of the respiratory system, where gas exchange occurs are
the pulmonary alveoli.
the pleurae.
the lungs.
the pulmonary vessels.
On its way to the pulmonary alveoli, inspired air comes in contact with various kinds of epithelia in the sequence
simple squamous, stratified squamous, simple cuboidal, and pseudostratified ciliated columnar epithelia.
pseudostratified ciliated columnar, stratified squamous, simple cuboidal, and simple squamous epithelia.
stratified squamous, pseudostratified ciliated columnar, simple cuboidal, and simple squamous epithelia.
pseudostratified ciliated columnar, stratified squamous, simple squamous, and simple cuboidal epithelia.
Which of the following is the correct sequence in which inspired air flows?
choana, pharynx, nasal fossa, larynx, trachea, bronchus, and lung
nasal fossa, pharynx, larynx, choana, trachea, bronchus, and lung
nasal fossa, choana, pharynx, larynx, trachea, bronchus, and lung
choana, nasal fossa, larynx, pharynx, trachea, bronchus, and lung
Which of the following does (do) not apply to the trachea or bronchi?
goblet cells
carina
cilia
simple squamous epithelium
The vocal folds are attached to
the cricoid and thyroid cartilages.
the cuneiform and cricoid cartilages.
the corniculate and thyroid cartilages.
the arytenoid and thyroid cartilages.
Adams apple is used to refer to
the trachea.
the thyroid cartilage.
the larynx.
the epiglottis.
A child who is a persistent mouth-breather because of blocked air passage in the nasopharynx probably has
palatine tonsils.
nasal meatuses.
paranasal sinuses.
pharyngeal tonsils.
Which of the following does not refer to a paranasal sinus?
maxillary
pterygoidal
sphenoidal
frontal
Mucus is secreted into the nasal cavity by
the goblet cells.
the vestibule.
the adenoids.
the choanae.
The roof of the nasal cavity is formed medially by
the superior concha.
the nasal bone.
the sphenoid bone.
the cribriform plate of the ethmoid bone.
Which of the following is (are) not located within the nasal cavity?
conchae
meatuses
uvula
nasal septum
The functions of the respiratory system include all of the following except
providing to the bloodstream and removing .
creating air pressure that allows for swallowing.
enabling vocalization as expired air passes over the vocal cords.
assisting in abdominal compression.
A structure that is not a part of the respiratory system is
the nasal cavity.
the pharynx.
the trachea.
the esophagus.
The term respiration refers to
ventilation (breathing).
gas exchange within the lungs.
utilization within the cells.
all of the above.