Tuba Flashcards
Which of the following cellular activity best describes the principal function of Clara cells?
A) Production of Inflammatory cytokines
B) Secretion of surfactant-like material
C) Receptors for binding pathogens
D) Fluid uptake via pinocytosis
E) Degradation of mucin
B) Secretion of surfactant-like material
Hyaline membrane disease is mainly associated with:
A) oxygen therapy at birth
B) type I pneumocyte development
C) type Il pneumocyte development
D) diaphragmatic hernia
E) larynx development
C) type Il pneumocyte development
Which of the following cells in the respiratory epithelium is a neuroendocrine cell?
A) basal cells
B) brush cells
C) ciliated cells
D) goblet cells
E) small granule cells
E) small granule cells
Which of following is true about false vocal cords?
A) They are located below the laryngeal ventricles
B) They have intrinsic muscle
C) They do not move during phonation
D) They have no seromucous glands
E) They are covered by stratified squamous epithelium
C) They do not move during phonation
Which of the following cells in the olfactory epithelium of the nasal cavity is responsible for the sense of smell?
A) Basal cells
B) Brush cells
C) Goblet cells
D) Olfactory cells
E) Sustentacular cells
D) Olfactory cells
In which structure does gas exchange occur?
A) Primary bronchi
B) Secondary bronchi
C) Tertiary bronchi
D) Alveolar duct
E) Terminal bronchiole
D) Alveolar duct
Which of the following histologic features distinguishes the trachea from an extrapulmonary primary bronchus?
A) Absence of submucosal glands
B) Adventitia composed of connective tissue
C) Lack of the cartilage in the bronchial wall
D) Loss of the respiratory epithelium
E) Presence of cartilage plates
E) Presence of cartilage plates
Which of the following statements is incorrect about the development of the respiratory system?
A) The mesoderm, which covers the outside of the lung, develops into the visceral pleura.
B) The cartilages and muscles of the larynx originate from mesenchyma of the fourth and sixth pharyngeal arches.
C) The pleuroperitoneal and pleuropericardial folds separate the pericardioperitoneal canals from the peritoneal and pericardial cavities.
D) In the canalicular phase of the lung development, the bronchioles divide continuously into more and smaller canals and the vascular supply increases steadily.
E) When the embryo is approximately 6 weeks old, the respiratory diverticulum (lung bud) appears as an outgrowth from the ventral wall of the foregut.
E) When the embryo is approximately 6 weeks old, the respiratory diverticulum (lung bud) appears as an outgrowth from the ventral wall of the foregut.
“Choking and continuos coughing were observed in a mewborn infant. There was an excessive amount of mucus secretion and saliva in the infant’s mouth and the infant experienced considerable difficulty in breathing. The pediatrician was unable to pass a nasogastric catheter through the esophagus into the stomach.”
Which of the following is the correct diagnosis for this patient?
A) Esophageal atresia
B Pulmonary agenesis
C) Pulmonary hypoplasia
D) Congenital cysts of the lung
E) Ectopic lung lobes
A) Esophageal atresia
Which of the following describes the principal function of ciliated columnar epithelial cells in respiratory epithelium of the trachea?
A) Fluid uptake via pinocytosis
B) Coordinated motion of mucus
C) Degradation of mucus polysaccharides motion
D) Production of anti-inflammatory molecules
E) Production of a surfactant-like material.
B) Coordinated motion of mucus
Which of the following is a true statement about the structures in the respiratory system?
A) Small granule cells found in the respiratory epithelium are derived from the endoderm.
B) Mucus is produced by sustentacular cells in the respiratory epithelium.
C) The luminal surface of the true vocal folds is covered by pseudostratified
ciliated columnar epithelium.
D) Pharyngeal surface of epiglottis is covered by nonkeratinized stratified squamous epithelium
E) There are sero-mucous glands in the laryngeal connective tissue of the true vocal folds.
D) Pharyngeal surface of epiglottis is covered by nonkeratinized stratified squamous epithelium
Which of the following are associated with the olfactory mucosa?
I. Bowman’s glands
II. Olfactory nerve
III. Goblet cell
IV. Lipofuscin pigment
V. Small-granule cells
VI. Sustentacular cells
A) I, II, IV
B) I, III, IV, V
C) I, II, IV, VI
D) I, III, IV, VI
E) I, II, IV, V, VI
C) I, II, IV, VI
“The squamous alveolar cells that cover most (95%) of the surface area of the pulmonary alveoli are connected to one another through junctions that prevent the leakage of interstitial fluid into the alveolar air spaces”
Which of the following types of intercellular junctions serve this important function?
A) Cadherins
B) Hemidesmosomes
C) Macula adherens
D) Zonula adherens
E) Zonula occludens
E) Zonula occludens
which one is the last part of bronchiol tree?
E) Respiratory bronchiole
Which of the following is not the function of the Clara cell?
a) Making toxins harmless in the inhaled air
b) Regeneration of the bronchiolar epithelium
c) Protection of the bronchiolar epithelium
d) Surfactant secretion in the terminal bronchiole
e) Reducing the surface tension of bronchioles
d) Surfactant secretion in the terminal bronchiole
