Saturday, July 18, 2015

DIGESTIVE SYSTEM ASSIGNMENT

DIGESTIVE SYSTEM
1.         Which of the following statement is incorrect?
            1) Ameloblasts are ectodermal in origin     
            2) Ameloblasts secrete enamel to cover the total teeth
            3) Odontoblasts are mesodermal in origin  4) Odontoblasts secrete dentine
2.         Assertion (A) : The wall of gut is prevented from being autodigested by the action of
pepsin, tryspin and chymotrypsin
Reason (R): Pespin, trypsin, chymotrypsin are secreted as “brush border enzymes” in
the form of pesinogen, trypsinogen and chymotrypsinogen respectively by the wall of gut
            1) Both (A) and (R) are true and (R) is the correct explanation of (A)
            2) Both (A) and (R) are true but (R) is not the correct explanation of (A)
            3) (A) is true but (R) is false                       4) Both (A) and (R) are false
3.         Read the following and arrange in a sequence pertaining to the simplification of proteins that started in stomach
            A. Dipeptidase           B. Tripeptidase      C. Trypsin                D. Pepsin
            1) A-B-C-D                 2) D-C-B-A             3) A-C-D-B               4) D-A-C-B
4.         Match the following and choose the answer
List-I
List-II
A. Gastrin
I. Inhibition of gastric secretion
B. Enterogastrone
II. Secretion of HCl
C. Secretin
III. Secretion of bicarbonates
D. Cholecystokinin
IV. Secretion of enzymes into bile juice

V. Acts on gall bladder
            1) A-II, B-I, C-III and D-V               2) A-II, B-III, C-I and D-V
            3) A-II, B-I, C-III and D-IV  4) A-II, B-I, C-V and D-IV
5.    Chylomicrons are formed in
       1. Intestine lumen                                     2. Intestinal mucosal cells
       3. Blood capillaries                                  4. Lacteals
6.    The following figure showing that duct system of liver, gall bladder and pancreas. Correct one about labeled part is
                                                Untitled-1 copy
       1. A – It is stimulated by secretin                        
       2. B – Its secretion stimulates contraction of sphincter of Oddi
       3. C – Its secretion comprises steapsin, carboxypeptidases
       4. D- Conducts digestive enzymes into duodenum
7. The hardest substance in the human body is secreted by                                                            
           1) Odontoblasts which are ectodermal in origin
          2) Ameloblasts which are ectodermal in origin
          3) Odontoblasts which are mesodermal in origin
           4) Ameloblasts which are mesodermal in origin                      
8. The teeth which are not present in the milk dentition of a baby, but are present in adult humans.                                                                                                    
           1) Canines and premolars                                   2) All Premolars and molars                                      3) Incisors and molars                     4) All premolars and last molars                                
9. Trace the passage of bile juice stored in the gall bladder into the lumen of duodenum. 
           1) Cystic ductcommon bile ducthepatopancreatic ductlumen of duodenum                                   2) Hepatic ductcystic ducthepatopancreatic ductlumen of duodenum                                      3) Bile canaliculihepatic ductcommon bile ductcystic ductlumen of duodenum             4) Hepatic ductsbile canaliculicystic ducthepatopancreatic ductlumen of duodenum
10. Select the mismatch among the following.                                                                     
           1) Cholecystokinin – contraction of gall bladder to release bile                                                                      2) Enterokinase – activation of trypsinogen
           3) Castle`s intrinsic factor – secreted by zymogen cells
           4) Lysozyme – secreted by paneth cells                                                  
11. Assertion (A): Bile juice is required for the activation of lipases of pancreatic juice and                               intestinal lipases.
       Reason (R): Bilirubin and biliverdin present in the bile juice help in the initial                                              emulsification of fats.
           1) Both A and R are true and R is the correct explanation of A                                                                     2) Both A and R are true and R is not the correct explanation of A                                                        3) A is false but R is true           4) A is true but R is false
12. Study the following statements and select the correct pair among them.
           I) Intestinal villi are lined by cuboidal epithelial cells that give rise to numerous microvilli.
           II) Villi and microvilli increase the surface area of absorption.
           III) Villi contain a network of lymph capillaries and a large artery.
           IV) Epithelial lining of villi secretes mucus which helps in the protection of the wall of intestine from action of enzymes.                                                                                             
           1) I & II                        2) II & III                     3) II & IV                     4) All                      
13. A lymphoid structure associated with the large intestine of human alimentary canal            
           1) Caecum                                                          2) Vermiform appendix                                                        3) Sigmoid colon                                                     4) Haustra                            
14. Match the following and choose the correct combination of answer.
            List – I                                                                                    List – II
           A. Brunner`s glands                                       I) Mucosa of small intestine
           B. Glisson`s capsules                                       II) Hepatic macrophages
           C. Crypts of Liberkuhn                                 III) Sheaths of connective tissue
           D. Kupffer cells                                              IV) Mucosa of stomach
                                                                                    V) Submucosal glands.
            A         B         C         D                                             A         B         C         D                      
           1)     V     III      IV     II                                    2)     V     III       I       II                                                       3)      I      III      V      II         4)      I      V      IV     II
15. The absorption of fructose and amino acids with the help of carrier ions is described as  
           1) Simple diffusion                                             2) Facilitated transport                                              3) Active transport                                                              4) Osmosis                           
16. The secretions which contain both enzymes and bicarbonates.                       
           1) Saliva and bile juice 2) Pancreatic juice and bile juice                                                        3) Pancreatic juice and succus entericus      4) Bile juice and gastric juice                                     
17. Study the following statements and select the incorrect pair among them.
           I) Constipation is a condition in which due to low water content, faeces are retained in the rectum resulting in irregular bowl movement.
           II) Diarrhoea is caused due to improper digestion.
           III) Proteins and fats yield almost the same amount of energy on oxidation.
           IV) Vomiting controlling centre is located in Medulla oblongata of brain. 
           1) I & II                        2) II & III                     3) III & IV                    4) I & IV                
18. Assertion (A): The undigested and unabsorbed substances in small intestine which mostly                                              contain fibre of plant is called roughage.
      Reason (R): Maximum absorption of the end products of digestion occurs in the small     intestine.
           1) Both A and R are true and R is not the correct explanation of A                                                   2) Both A and R are true and R is the correct explanation of A                                                                                        3) A is true but R is false   4) A is false but R is true                                   
19. Select the correct statement among the following.                                
           1) Chyme is formed in the stomach and it contains partially digested proteins and carbohydrates.
           2) Mucus produced by the wall of stomach forms a physical barrier to prevent trypsin from damaging the wall of stomach.
           3) The enzymes present in the pancreatic juice and secretions of intestinal glands together constitutes succus entericus.
           4) HCl secreted by the parietal cells of the fundic glands, activate pepsin and rennin into pepsinogen and prorennin respectively.                                       
20. Select the correct statements among the following
           I) The products of digestion of fats combine with bile salts to form micelles in the lumen of ileum.
           II) Chylomicrons are transported into blood capillaries by exocytosis.
           III) In the blood stream of subclavian vein, chylomicrons are broken down into fatty acids and glycerol.
           IV) Absorption of water, drugs and minerals occurs mainly in stomach.
           1) I & II                        2) I & III                       3) II & III                     4) All          
21. Study the following table and select the correct combination of answers.
             Secretion                                   Production site                                            Action            
           A. Gastrin                    Epithelium of stomach                      Stimulates secretion of HCl and                                                                                                                     pepsinogen    
           B. Secretin                   Epithelium of duodenum                  Enhances gastric motility
           C. Cholecystokinin     Epithelium of duodenum                  Stimulates secretions of water and                                                                                        bicarbonates of pancreatic juice     
           D. Lysozyme                Serous cells of salivary glands          Bactericidal action.                 
           1) A & B                       2) B & C                       3) C & D                       4) A & D                
22. Which one of the following activity is not carried out by liver and its secretions?     
           1) Activation of lipases of pancreatic juice and intestinal lipases.
           2) Synthesis of plasma proteins like albuminus & globulins and blood clotting factors such as fibrinogen and prothrombin.
           3) Conversion of fats into fatty acids and glycerol.                                                                                         4) Conversion of lactic acid into glycogen.                                                  
23. Enzymes acting upon nuclic acids are present in                                                                       
           1) Pancreatic juice and intestinal juice.              2) Bile juice and pancreatic juice                                          3) Saliva and gastric juice  4) Gastric juice and pancreatic juice                  
24. The amount of energy yielded by 1 gm of proteins and fats respectively.                              
           1) 4.0 Cal and 9.0 Cal                                        2) 9.0 Cal and 4.0 Cal
           3) 4.0 K.Cal and 9.0 K.Cal                                4) 9.0 K.Cal and 4.0 K.Cal  
25. Chilomicrons Fatty acids and glycerol. Here ‘X’ means
           1) Lipoprotein lipase of pancreas                       2) Lipoprotein lipase of liver                                     3) Lipoprotein lipase of small intestine                    4) Lipoprotein lipase of endothelial wall     
26. Which of the following is not a function of largest gland? 
           1) Thermogenesis                                                2) Ornithine cycle                                                                 3) Production of heparin    4) Secretion of steapsin                                             
27. Saliva contains
           1) Ptyalin                      2) Mucin                       3) Lysozyme                 4) All
28. The following are the statements regarding “Universal tooth brush”.
           I) It is a muscular sense organ.
           II) A fold of tissue which attaches it to the floor of the oral cavity is called gingiva.
           III) It helps in mixing saliva with food and deglutition.
           IV) It also helps in taste detection and speaking.
           Which of the above are correct?                                                        
           1) All                             2) All except II             3) I, II and IV only       4) II and III only
29. Teeth are                                                                                                                
           1) Endo, mesodermal in origin                           2) Ecto, endodermal in origin                                               3) Ecto, mesodermal in origin                                  4) Ecto, endo, mesoderal in origin   
30.      SUBSTRATE               ENZYME                                        PRODUCTS
           Nucleotides                                          A                                             Nucleosides + Phosphates
            B                                                 Pepsin                                             Peptones
           Sucrose                                                C                                             Glucose + Fructose
           Fats                                                         Bile salts                                                  D
           Here A, B, C and D respectively are
           1) Nueleotidases; Calcium para caseinate; Invertase; Monoglycerides
           2) Nucleosidases; Proteins; Sucrase; Fatty acid and glycerol
           3) Nucleosidases; Proteins; Invertase; Monoglycerides
          4) Nucleotidases; Calcium paracaseinate; Sucrase; emulsified fats                
31. The type of papillae present at the tip of tongue is                                                                    
           1) Filiform papillae                                             2) Foliate papillae        
          3) Fungiform papillae                                          4) Circumvallate papillae
32. Hormone gastrin is secreted by                                        
          1) Cardiac glands                                               2) Chief cells of oxyntic glands                                            3) Pyloric glands                                                      4) Parietal cells of oxyntic glands                
33. Auto catalysis in alkaline medium is exhibited by
           1) Chymotrypsinogen   2) Pepsinogen              
          3) Trypsinogen                                                     4) Both 2 & 3               
34. Arrange the following in a correct sequence of decreasing complexity.
           A) Liver                                   B) Hepatic cells                                  C) Hepatic lobules
           D) Hepatic cords                     E) Liver lobes
           1) A E C B D                                 2) B D E C A
          3) A E C D B                                 4) B E D C A   
35. Angiotensinogen is a protein produced by         
           1) The organ in which ornithine cycle takes place
           2) The organ which eliminates urea
            3) The organ which releases ADH                  4) The organ which releases Renin    
36. Match the following
           Column I (Cells)                                                          Column –II (Parts)                                       
           A. Kupffer`s cells                                                        I. Salivary glands
           B. Paneth cells                                                 II. Bowman`s capsule
           C. Serous cells                                                 III. Base of Intestine gland
           D. J.G cells                                                                  IV. Liver
           E. Podocytes                                                                V. Afferent renal arteriole                           A         B  C         D         E                                 A         B         C         D         E                    
           1)    IV     III      II       I       V                           2)     IV    III       I       II      V
           3)    IV     III      V      I       III                          4)     IV    III       I       V      II
37. Chilomicrons are formed in                                                                                                                  
           1) Intestinal lumen                                              2) Intestinal mucosal cells
           3) Blood capillaries                                             4) Lacteals
38. What will happen if the secretion of parietal cells of the gut epithelium is blocked with an inhibitor?                                                                                                                               
           1) Trypsinogen is not converted to trypsin        
           2) Deficiency of chymotrypsin in gastric juice
           3) Deficiency of pepsinogen in gastric juice
           4) Inactive pepsinogen is not converted into the active enzyme pepsin         
39. Which of the following are correct statements?          
           I. The number of monophyodont teeth in adult man is similar to the number of thoracie vertebrae in adult man.
           II. The number of cheek teeth in adult man is similar to number of milk teeth
           III. The number of vertebro-sternal ribs is similar to the number of phalanges in ONE fore limb
           IV. The number of wisdom teeth is similar to the number of false ribs
           1) I, III, IV                   2) I, II, IV                     3) I, II, III                     4) All
40.           Odd one in the following with reference to location is
1)Adenoids                                                                 2)Palatine tonsils
3)Abdominal tonsil                                                     4)Lingual tonsils
41.           Following are the different layers in a tooth
A)Dentine                         B)Cementum                   C)Pulp cavity                   
D)Periodontal membrane        E)Jaw bone             F)  Layer of odontoblasts
Arrange them in sequence from outside to inside.
1)E-D-B-A-F-C                2)E-A-B-F-D-C                3)C-E-D-B-A-F                  4)C-E-A-D-B-F
42.           Final step in the digestion of nucleic acids is catalysed by
1)Phosphatase                   2)Nucleosidases                3)Nucleotidases                  4)Nucleases
43.           Study the following statements and choose the correct answer
i)Neutral fats are stored in the adipose tissue and liver
ii)Small protein coated fat globules called micelles are transported into lacteals by exocytosis
iii) Peristaltic movements of intestine are fast and help in the transport of nutrients into the ileum
iv)Calorific value of 1gm of fats is more than the calorific value of 1gm of carbohydrates and 1gm of proteins put together
1)i & ii                               2)ii & iii                             3)i & iv                               4)ii & iv
44.           Assertion(A): Absorption of glucose into the epithetial cells occurs by simple diffusion and into blood  from these cells by active transport.
Reason(R ): Glucose content in the epithelial cells is lesser than its content in the lumen of intestine and blood.
1)A & R are true R explains A                                   2)A&R are true R does not explain A
3)A is true but R is false   4)A is false but R is true
45.           Portion of pharynx that is a common chamber for the passage of food and air is
1)Oropharynx                                                              2)Buccal cavity
3)Laryngopharynx                                                      4)Nasal passages
46.    Arrange the following sphincters in a sequence from anterior to psterrior parts of
         alimentary canal
         A. Phyloric sphincter                                          B. Gastro-oesophageal sphincter
         C. Anal sphincter with smooth muscles            D. Anal sphincter with striated muscles
         1) A, B, C, D                    2) D, B, C, A              3) B, A, C, D                    4) C, B, A, D
47.    Which of the following occur in acidic medium
         I.
         II.           
         III.
         IV.
         1) Only I and II                                                    2) Only I & III
                                          3) All                                                                     4) All except III
48.  Lipoprotein lipase is secreted by
                                                   1) Gastric  glands        2) Pancrease                      3) Endothelial cells                       4) Salivary glands
49.     Read the following and arrange them in correct sequence of transport of fatty acids and glycerol from the ileum into the hapatocytes.
          A. Exocytosis                                                     D. Micelles
          B. Left subclavian vein                                     E. Thoracic duct
          C. Lipoprotein lipase  F. Chilomicrons
                                                                                                                           G. Lacteals
          1) F-A-G-D-E-B-C                                                     2) D-F-A-G-E-B-C       
          3) D-A-E-G-F-C-E                                                     4) G-F-E-D-C-B-A                                           
50.     Sites of synthesis of urea and glycogen are located in the liver and their synthesis which are involved respectively
          1) Pre-erythrocytic and coricycle                               2) Ornithine cycle and Exo-erythrocytic cycle
            3) Cross-bridge cycle and ornithine cycle       4) Ornithine cycle and cori cycle
51.     Salivary amylase action requires a pH of
          1) 5.8 pH                            2) 6.8 pH                         3) 7.8 pH                        4) 8.8 pH                    
52.     One of the following is not a constituent of pancreatic juice
            1) Trypsinogen            2) Chymotrypsinnogen           3) Enterokinase           4) Carboxy peptidase
53.     The papillae present at anterior margin and tip of tongue of humans
          1) filiform papillae        2) fungiform papillae    3) circumvallate papillae        4) foliate papillae
54.     Papillae present on the posterior surface of human tongue are
          1) Filiform papillae                                             2) Circumvallate papillae      

          3) Fungiform papillae   4) Pharyngeal papillae

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