Free NEET Biology multiple-choice questions on Digestive Glands & Enzymes. Attempt each question and reveal the answer with a full explanation.
Secretin and cholecystokinin are digestive hormones. They are secreted in - Oesophagus Ileum Duodenum Pyloric stomach Which of the following functions is not performed by secretions from salivary glands? Digestion of complex carbohydrates Lubrication of oral cavity Digestion of disaccharides Control bacterial population in mouth Match List I with List II : array llll ; & List-I & ; & List-II A. & Lipase & I. & Peptide bond B. & Nuclease & II. & Ester bond C. & Protease & III. & Glycosidic bond D. & Amylase & IV. & Phosphodiester bond array Choose the correct answer from the options given below : A-IV, B-II, C-III, D-I A-III, B-II, C-I, D-IV A-II, B-IV, C-I, D-III A-IV, B-I, C-III, D-II Glucagon is a hyperglycemic hormone. Which specific cells of the Islets of Langerhans are responsible for its secretion? -cells -cells -cells F -cells Which of the following is an example of a peptide hormone? Insulin Cortisol Testosterone Thyroxine Which hormone produced by the alpha cells of the Islets of Langerhans acts primarily on hepatocytes to stimulate glycogenolysis? Glucagon Insulin Somatostatin Cortisol The hormone 'Secretin' acts on which organ to stimulate the secretion of water and bicarbonate ions? Exocrine pancreas Gall bladder Stomach Liver Cholecystokinin (CCK) acts on which of the following to stimulate the secretion of bile juice and pancreatic enzymes respectively? Gallbladder and Pancreas Liver and Stomach Pancreas and Liver Stomach and Duodenum Which hormone acts on the exocrine pancreas to stimulate the secretion of enzymes and also causes the contraction of the gallbladder? Cholecystokinin (CCK) Secretin Gastrin Enterogastrone In the mechanism of blood clotting, the enzyme complex 'Thrombokinase' is required for the conversion of: Prothrombin to Thrombin Fibrinogen to Fibrin Prothrombin to Fibrinogen Thrombocytes to Thromboplastin Insulin, a peptide hormone, enhances cellular glucose uptake and utilization by acting primarily on which target cells? Hepatocytes and Adipocytes Skeletal muscle cells only RBCs and Brain cells Nephrons and Alveoli During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process: Proteins Enzyme(A) Polypeptides Enzyme(B) Amino acids, are respectively- Amylase and Maltase Diastase and Lipase Pepsin and Trypsin Invertase and Zymase Where are Brunner's glands located in the human digestive system, and what is their primary function? Sub-mucosa of duodenum; secrete alkaline mucus Mucosa of esophagus; secrete pepsinogen Sub-mucosa of stomach; secrete gastrin Mucosa of ileum; secrete lipase The opening of the hepato-pancreatic duct into the duodenum is guarded by a sphincter called the: Sphincter of Oddi Pyloric sphincter Cardiac sphincter Ileocaecal valve Which of the following gastric cells indirectly help in erythropoiesis? Goblet cells Mucous cells Chief cells Parietal cells Match the following structures with their respective location in organs array ll (a) Crypts of Lieberkuhn & (i) Pancreas (b) Glisson's Capsule & (ii) Duodenum (c) Islets of Langerhans & (iii) Small intestine (d) Brunner's Glands & (iv) Liver array Select the correct option from the following (a) (b) (c) (d) (1) (iii) (ii) (i) (iv) (2) (iii) (i) (ii) (iv) (3) (ii) (iv) (i) (iii) (4) (iii) (iv) (i) (ii) Match List I with List II array ll List I (Cells) & List II (Secretion) A. Peptic cells & I. Mucus B. Goblet cells & II. Bile juice C. Oxyntic cells & III. Proenzyme pepsinogen D. Hepatic cells & IV. HCl and intrinsic factor for absorption of vitamin B 12 array Choose the correct answer from the options given below: (1) A-IV, B-III, C-II, D-I (2) A-II, B-I, C-III, D-IV (3) A-III, B-I, C-IV, D-II (4) A-II, B-IV, C-I, D-III The initial step in the digestion of milk in humans is carried out by ? Lipase Trypsin Rennin Pepsin In the stomach, gastric acid is secreted by the :- (1) gastrin secreting cells (2) parietal cells (3) peptic cells (4) acidic cells Cholecystokinin acts on: Pancreas and gall bladder Gastric glands and liver Pancreas and duodenum Pancreas and intestine Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes. (1) Duodenal Cells (2) Chief Cells (3) Goblet Cells (4) Oxyntic Cells The enzyme enterokinase helps in conversion of trypsinogen into trypsin caseinogen into casein pepsinogen into pepsin protein into polypeptides Succus entericus is referred to as: Intestinal juice Gastric juice Chyme Pancreatic juice Sphincter of oddi is present at: Junction of hepato-pancreatic duct and duodenum Gastro-oesophageal junction Junction of jejunum and duodenum Ileo-caecal junction