Tuba Flashcards
Which one of the following is incorrect about structure of teeth?
A) The crown is the portion of the tooth that is visible in the oral cavity.
B) The periodontal ligament attaches the tooth roots to bony sockets
C) The cementum overlies dentine of the roots.
D) The enamel is produced by odontoblasts.
E) The pulp cavity is a cavity in the center of the tooth.
D) The enamel is produced by odontoblasts.
Which one of the following is correct about the structures in the oral cavity?
A) Numerous taste buds are found in the epithelium lining the lateral surfaces of filiform papillae.
B) The lining mucosa is found on the gingiva (gums) and the hard palate.
C) The vermilion zone is devoid of sweat glands and hair follicle.
D) Supporting cells are the most numerous cells in the taste bud.
E) The oral aspect of the hard palate is covered by respiratory epithelium.
C) The vermilion zone is devoid of sweat glands and hair follicle.
Which of the following is true about the structures found in the oral cavity?
A) The ameloblasts maintain their association with enamel for the life of the tooth.
B) Von ebner glands drain their secretions into lingual tonsil cripta.
C) Ameloblasts are lined up side by side in a strict order, and there are tight Junction type links between them.
D) There are sero-mucous mixed glands in the lamina propria of the nasal aspect of the hard palate.
E) Supporting cells, found in the taste buds, are responsible for receiving taste sense.
D) There are sero-mucous mixed glands in the lamina propria of the nasal aspect of the hard palate.
A 48-year-old man complains of painful ulcers in his mouth. Physical examination reveals multiple shallow ulcers covered by a fibrinopurulent exudate on the inner surface of the upper lip and cheek. The patient is subsequently diagnosed with aphthous stomatitis, an inflammation of the oral mucosa. Which of the following types of epithelium covers these affected areas of the oral cavity?
A) Keratizined stratified squamous epithelium
B) Nonkeratizined stratified squamous epithelium
C) Simple columnar epithelium
D) Simple squamous epithelium
E) Stratified columnar epithelium
B) Nonkeratizined stratified squamous epithelium
Which of the following is false about the Parietal (axyntic) cells in the gastric mucosa during actively secreting?
a) Tubulovesicles fuse with canaliculi
b) The numbers of H+/K+ ATPase increases
c) The number of microvilli in the canaliculi increases.
d) Acid secretion occurs into the cytoplasm
e) The tubulovesicular system is reduced significantly
d) Acid secretion occurs into the cytoplasm
Where is the eleidin found that gives color to the lips?
a) In the vermilion zone epithelium
b) In the outer surface epithelium
c) In the orbicularis oris muscle
d) In the wall of veins in the Vermilion zone
e) On the wall of veins on the outer surface
a) In the vermilion zone epithelium
Which of the following is false about lamina propria of large intestine?
a) Elaborate development of the GALT
b) Secretion of collagen table by fibroblasts of the pericryptal sheath
c) Presence of lacteals in the lamina propria
d) Presence of collagen table
e) Presence of pericryptal fibroblast sheath
c) Presence of lacteals in the lamina propria
Which of the following structures forming the tooth originates from the ectoderm?
a) Pulp
b) Dentin
c) Cementum
d) Periodontal ligament
e) Enamel
e) Enamel
Which cells convey microorganisms and other macromolecules from the intestinal lumen to Peyer’s patches?
a) M cells
b) Paneth cells
c) Enterocytes
d) Enteroendocrine cells
e) Goblet cells
a) M cells
In which areas of the digestive tract, the gland structures are found in both the lamina propria and the submucosa?
a) Stomach and dudenum
b) Esophagus and stomach
c) Esophagus, stomach, dudenum and lleum
d) Esophagus and duodenum
e) Stomach duodenum and ileum
d) Esophagus and duodenum
Which of the following is true statement about stomach histology?
a) Myenteric (Auerbach’s) plexus provides innervation of the smooth muscle of the muscularis mucosae
b) The epithelium that lines the gastric pits is simple columnar striated border epithelium
c) There are numerous chief cells that secrete the pepsinogen in fundic glands
d) Neck mucus cells secrete a visible mucus and responsible for the high bicarbonate and potassium concentration of the epithelium
e) Muscularis externa is composed of two muscle layers, arranged as an inner circular and outer longitudinal layer
c) There are numerous chief cells that secrete the pepsinogen in fundic glands
Which of the following is true about the place where the sodium is removed from primary saliva and potassium and bicarbonate lons are secreted in it?
a) Intercalated duct
b) Striated duct
c) Serous acinus
d) Interlobular duct
e) Mixed acinus
b) Striated duct
Which of the following cells maintains their relationship with dentin throughout the life of the tooth and produces predentin?
a) Cementocytes
b) Osteoblasts
c) Ameloblasts
d) Fibroblasts
e) Odontoblasts
e) Odontoblasts
Which of the following cells secretes pepsinogen in the stomach?
a) Undifferentiated adult stem cells
b) Chief cells
c) Mucous neck cells
d) Enteroendocrine cells
e) Parietal cells
b) Chief cells
Which of the following cells secretes HC1 and intrinsic factor in the stomach?
A) Mucous neck cells
B) Chief cells
C) Parietal cells
D) Enteroendocrine cells
E) Undifferentiated adult stem cells
C) Parietal cells
