MCQs on Gastrointestinal Tract and Liver Physiology Part 4

# Pancreatic juice rich in water and electrolytes but poor in enzymes is secreted in response to :
A. Pancreatozymine
B. Cholecystokinin
C. Secretin
D. Proteins

# Secretin is secreted by :
A. Duodenum
B. Pancreas
C. Liver
D. Stomach

# Urine urobilinogen is absent in :
A. Obstructive jaundice
B. Viral hepatitis
C. Hemolytic jaundice
D. All of the above

# Which of the following is a reflex mediated by vagus ?
A. Bile flow from liver
B. Pancreatic secretion of bicarbonate
C. Cephalic phase of gastric secretion
D. Mucous secretion from the Brunner's glands

# Fats absorbed with the help of bile salts are:
A. Free fatty acids
B. Glycerol
C. Higher fatty acids, diglycerides and monoglycerides
D. All of the above

# Which of the following secretions has a very high pH ?
A. Gastric juice
B. Pancreatic juice
C. Bile in gall bladder
D. Saliva
# Cephalic phase of gastric secretion can be demonstrated by the following experiment:
A. Heidenhan's pouch
B. Condition reflex
C. Pavlov's pouch
D. None of the above

# Trypsin is an activator of all of the following enzymes except:
A. Chymotrypsinogen
B. Pepsinogen
C. Proelastase
D. Procolipase

# Gastrointestinal hormone among the following is:
A. Pepsin
B. Ptyalin
C. Cholecystokinin
D. Trypsin

# The most important action of secretin is to :
A. Neutralise the acid from the stomach
B. Increase secretion of bicarbonates by pancreas
C. Decrease gastric secretion
D. cause contraction of pyloric sphincter

# Within which parts of a gastric gland are chief cells located ?
A. Fundus
B. Isthmus
C. Neck
D. Gastric pit

# All the following causes the secretion of gastric juice during cephalic phase except :
A. Food in the mouth
B. Sight of food
C. Food in the stomach
D. Thought of food

# Which is not produced enteroendocrinally ?
A. Intrinsic factor
B. Secretin
C. Motilin
D. GIP

# Stomach accommodates the meal by:
A. Deceptive relaxation
B. Receptive relaxation
C. Reactive relaxation
D. None of the above
# The intrinsic factor for vit B12 absorption is produced in the :
A. Liver
B. Stomach
C. Pancreas
D. Duodenum

# Bile salt repeats its cycle :
A. 4 times a day
B. 8 times a day
C. 2 times in between meals
D. 10 times a day in fasting

# Bile color is due to :
A. Creatinine
B. Bilirubin
C. Globulin
D. 5 Mercapto-purine

# Which of the following is not a salivary antibacterial Substance ?
A. Amylase
B. Lactoperoxidase
C. Lysozyme
D. Lactoferrin

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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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