MCQs on Gastrointestinal Tract and Liver Physiology Part 3

# Parietal cells of gastric mucosa secrete :
A. HCl
B. Gastrin
C. Mucin
D. All of the above

# Most potent stimulus for secretin is :
A. Dilatation of intestine
B. Acid chyme
C. Protein
D. Fat

# The only sugar absorbed in the intestine against a concentration gradient is :
A. Xylose
B. Mannose
C. Glucose
D. Galactose

# Cephalic phase of Gastric secretion is mediated by :
A. Neurohormones
B. Vagus
C. Hormones
D. Gastrin

# Secretin does not cause :
A. Bicarbonate secretion
B. Augment the action of CCK
C. Contraction of pyloric sphincter
D. Gastric secretion increase
# The final sugars in intestinal chyme are :
A. Glucose and fructose
B. Ribose and mannose
C. Ribose and xylulose
D. Xylulose and fructose

# Gastric secretion is stimulated by all of the following except :
A. Secretin
B. Gastric distension
C. Gastrin
D. Vagal stimulus

# Peristalsis in the gut is due to :
A. Pre-peristaltic intestinal secretion
B. Mechanical distension
C. Simultaneous action of circular and longitudinal mnuscles
D. Extrinsic nervous influence

# Maximum absorption of bile occurs at :
A. Jejunum
B. Duodenum
C. Ileum
D. Colon

# Gall bladder contraction is controlled primarily by :
A. Pancreatozymine
B. Cholecystokinin- pancreozymin
C. Secretin
D. Glucagon
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MCQs on Gastrointestinal tract and Liver Physiology Part 2

# Pepsinogen is activated by :
A. Enterokinase
B. low pH
C. Trypsin
D. Chymotrypsin

# Best stimuli for secretin secretion is :
A. Protein
B. Acid
C. Fat
D. Bile

# Maximum secretory glands in stomach are :
A. Fundic glands
B. Pyloric glands
C. Gastric glands
D. Brunner's Glands

# All are actions of CCK except:
A. Relax lower esophageal sphincter
B. Increased pancreatic secretion
C. Increased gastric secretion
D. Causes gall bladder contraction

# Vagal stimulation following intake of food does not affect secretion of :
A. Stomach
B. Pancreas
C. Parotid
D. Gall bladder

# Gastrin is produced by :
A. Pancreas
B. Gastric antral cells
C. Pituitary
D. All
# Small intestinal peristalsis is controlled by :
A. Myenteric plexus
B. Meissner's plexus
C. Vagus nerve
D. Parasympathetic

# The duodenum secretes a hormone which has the following effects except :
A. Causes copious pancreatic juice rich in bicarbonate and poor in enzymes
B. Increases gastric motility
C. Causes gall bladder to contract and sphincter of oddi to relax
D. Leads to meager flow of pancreatic juice rich in enzymes

# Cholagogues are the substances which cause :
A. Contraction of the gall bladder
B. Increase concentration of the bile
C. Increase secretion of the bile
D. Favours acdification of the bile

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MCQs on Oral Histology Enamel - Part 2

# All are true regarding the enamel spindles except :
A. Produced by ameloblasts
B. Found in the region of cusps
C. Surrounded by inter prismatic enamel
D. Terminated as rounded process

# Ionic exchange between enamel surface and environment :
A. Does not take place once enamel matures
B. Stops after 2 years of eruption
C. Continues till adult life
D. Continues throughout life

# Approximately how many enamel rods will be present in maxillary molar?
A. 5 million
B. 7 million
C. 9 million
D. 12 million

# All are true about the striae of Retzius except:
A. Constitute the rest lines within the enamel rods
B. Have high inorganic content
C. They are areas of increased porosity
D. Allow the movement of water and small ions

# Neonatal lines are found in all of the following except :
A. Enamel of primary incisors
B. Enamel of premanent canines
C. Enamel and dentin of permanent first molars
D. Dentin of permanent mandibular incisors
# On microscopic examination, enamel rods have :
A. Keyhole appearance in cross section
B. Paddle appearance in cross section
C. Lanullate appearance in cross section
D. None of the above

# Which of the following structures is not of ectodermal origin ?
A. Hunter Schreger bands
B. Enamel spindles
C. Enamel Tufts
D. Enamel lamellae

# The formative cells of which of the following dental tissues disappear once tissue is formed ?
A. Enamel
B. Dentin
C. Periodontal ligament
D. Cementum

# Which of the following tissues have no reparative capacity ?
A. Enamel
B. Dentin
C. Cementum
D. Periodontal ligament

# The enamel has no capacity of self repair because :
A. It has only small percent of organic content
B. Its formative cells are lost once it is completely formed
C. It is essentially a keratin tissue and has no blood vessels
D. It has no direct connection with the active cells of the dental pulp

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MCQs on Odontogenic cysts and Tumors - Oral Pathology Part 2

# Ghost (Shadow) cells are seen in:
A. Ameloblastic fibroodontoma
B. Calcifying odontogenic cyst
C. Compound Odontoma
D. All of the above

# A 25 year old male patient reports with a bony expansile swelling of the right body of the mandible & mild paraesthesia of the IDN. OPG shows a multilocular  radiolucency without root resorption.
i) What would be your choice of next investigation?
A. Excision biopsy
B. Aspiration cytology
C. CT scan
D. PET bone scan

ii) A dirty white aspirate with a protein estimation of <4gm% is suggestive of:
A. Ossifying fibroma
B. Dentigerous cyst
C. Mucoepidermoid carcinoma
D. Odontogenic keratocyst

iii) Odontogenic keratocyst is noted for its:
A. Malignant transformation
B. Daughter cysts and high rate of recurrence
C. Impacted teeth
D. Nodal metastasis

iv) Management of odontogenic keratocyst involves :
A. Marsupialization
B. Enucleation
C. Enucleation with peripheral ostectomy
D. Resection and radiation

# Treatment for cementoma : (two answers)
A. No treatment
B. Pulpectomy
C. Resection of jaw
D. None of the above

# Lesions associated with vital tooth :
A. Condensing osteitis
B. Cementoma
C. Periapical abscess
D. None of the above

# Destructively invasive, locally malignant with rare metastasis, the lesion is:
A. Fibroma
B. Ameloblastoma
C. Papilloma
D. None of the above

# Compound odontoma shows :
A. Mixed tissue of dental origin with no rsemblance to tooth structure
B. Numerous tooth like structure with denticles commonly found in maxillary lateral incisors
C. Haphazardly arranged calcified mass
D. all of the above

# Dentigerous cyst is suspected if the follicular space is more than:
A. 2-3 mm
B. 3-4 mm
C. 1-2 mm
D. >5 mm

# After entering a radiolucent lesion in a 30 yr old man, hollow cavity without epithelial lining is seen, the most probable diagnosis is :
A. Aneurysmal bone cyst
B. Static bone cavity
C. Hemorrhagic bone cyst
D. Ameloblastoma

# A patient with ameloblastoma of the jaw can best be treated by:
A. Irradiation
B. Excision
C. Enucleation
D. Surgical removal followed by cauterization
# Dentigerous cyst is associated with the following :
A. Impacted third molar
B. Impacted supernumerary tooth
C. Odontome
D. All of the above

# The epithelium of a dentigerous cyst is :
A. 15-20 cell thick
B.  6-10 cell thick
C. 2-4 cell thick
D. 1-2 cell thick

# Clear cells are commonly seen in which of the following lesions ?
A. Pleomorphic
B. Warthin's tumor
C. Mucoepidermoid
D. Adenomatoid odontogenic tumor

# Multiple periapical radiolicencies are seen in:
A. Jaw cyst basal cell nevus syndrome
B. Odontogenic keratocyst
C. Cherubism
D. Thyroid disorders

# A 36 year old male with an asymptomatic swelling in the body of the mandible with radiographic features of radiolucency with radiopaque flecks is suffering from :
A. Odontogenic keratocyst
B. Calcifying epithelial odontogenic tumor (CEOT)
C. Ameloblastoma
D. None of the above

# Pindborg tumor arises from : (two answers correct)
A. Basal layer of cells
B. Stratum intermedium
C. Stratum corneum
D. Dental lamina

# A six year old child patient has blue dome shaped swelling in posterior mandibular region, what will be the treatment plan?
A. reassure the patient without any treatment
B. Excise the lesion
C. Marsupialization
D. Surgical excision

# The pathogenesis of periapical cyst is :
A. Increased pressure within the cyst
B. Immune mediated bone destruction
C. Proliferation of  epithelium
D. None

# Adenomatoid odontogenic tumor is characterized histologically by :
A. Polyhedral epithelial cells
B. Tubular/duct like cells
C. Stellate shaped cells
D. Stratified squamous epithelial cells

# Cyst arising from dental lamina :
A. Radicular cyst
B. Paradental cyst
C. Eruption cyst
D. Glandular odontogenic cyst
# The most common odontogenic cyst is:
A. Primordial cyst
B. Dentigerous cyst
C. Radicular cyst
D. Mucocele

# Standard treatment of ameloblastoma :
A. Segmental resection with 1 cm of normal bone
B. Enbloc resection
C. Enucleation
D. Enucleation with cauterization

# The most aggressive and destructive cyst is :
A. Periapical cyst
B. Dentigerous cyst
C. Globullomaxillary cyst
D. Nasopalatine cysst

# Facial nerve paralysis is common with:(D>B)
A. Pleomorphic adenoma
B. Epidermoid carcinoma
C. Warthin's tumor
D. Lymphoepithelial carcinoma

# COC is now called as:
A. Odontogenic ghost cell tumor
B. Dentinogenic ghost cell tumor
C. Keratocystic Odontogenic tumor
D. A and C

# Multiple bilateral dentigerous cysts are seen in:
A. Down's syndrome
B. Maroteaux Lamy syndrome
C. Treacher Collins Syndrome
D. Gorlin Goltz syndrome

# The cyst that remains behind in the jaws after removal of the tooth is :
A. Lateral periodontal cyst
B. Radicular cyst
C. Residual cyst
D. None of the above

# Corrugated collagenous rings surrounding lymphocytes and plasma cells in the walls of inflammatory cysts are called:
A. Rushton bodies
B. Hyaline bodies
C. Howell-Jolly Bodies
D. Papenheimer bodies

# Potential complications stemming from dentigerous cyst are:
A. Ameloblastoma
B. Epidermoid carcinoma
C. Mucoepidermoid carcinoma
D. All of the above

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