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Digestion and Absorption Test - 8

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Digestion and Absorption Test - 8
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  • Question 1
    1 / -0
    Which of the following terms describe human dentition?
    Solution

    Correct option: D

    Explanation:

    ·  Thecodont dentition in which the base of tooth is embedded in jaw sockets.

    ·  Diphyodont dentition means two successive set of teeth develop during lifetime and first set is deciduous like milk teeth’s which than replaced by second set of teeth’s  which are permanent teeth or adult teeth’s.

    ·  Heterodont dentition means when there is more than one tooth morphology in animal, as humans have different types of teeth: Incisors, Canines, Premolars and Molars.

    Hence, all these features are dentition in humans ‘Thecodont, Diphyodont and Heterodont’ is the correct answer. 

  • Question 2
    1 / -0
    Which of the following enzyme is not present in succus entericus?
    Solution
    Correct Option: C
    Explanation:
    • Succus entericus is an intestinal juice secreted by small intestine in small amounts.
    • Succus entericus is the clear to pale yellow watery secretions from the glands lining the small intestine walls. It contains hormones, digestive enzymes, mucus and bicarbonate. It doesn't contain  nuclease enzyme.
    • Nucleases like exonuclease or endonuclease degrade the nucleic acid moiety and are not present in the intestinal juice.
    Hence, enzyme that is not present in succus entericus is Nucleases.

  • Question 3
    1 / -0
    Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes.
    Solution
    Goblet cells secrete mucus are bicarbonates present in the gastric juice which plays an important role in lubrication and protection of the mucosal epithelium from excoriation by the highly concentrated HCl.
    So, the correct answer is 'Goblet Cells'

  • Question 4
    1 / -0
    Which of the following guards the opening of hepatopancreatic duct into duodenum?
    Solution
    The sphincter of Oddi (or hepatopancreatic sphincter) is a muscular valve made up of smooth muscles that control the flow of digestive juices (bile and pancreatic juice) through the ampulla of Vater into the second part of the duodenum by the movement of muscular wall. It surrounds the end portion of the bile duct and pancreatic duct and hence, called as a hepatopancreatic sphincter.
  • Question 5
    1 / -0
    Where do certain symbiotic microorganims normally occur on human body?
    Solution
    The caecum accepts and stores processed material from the small intestine and moves it towards the colon. Most mammalian herbivores have a relatively large cecum, hosting a large number of bacteria, which aid in the enzymatic breakdown of plant materials such as cellulose.
  • Question 6
    1 / -0
    Bruners gland are characteristic feature of 
    Solution
    Brunner's gland is a characteristic feature of duodenum part of small intestine. It is found in the submucosa of the duodenum and secret two important vitamin secretin and cholecystokinin, which in turn stimulate pancreas and gall bladder.
    So, the correct answer is option C.
  • Question 7
    1 / -0
    Liver gland secretes 
    Solution
    The liver is considered as the largest organ in the human body. There are hepatic cells which are arranged in cords. The hepatic cells secrete the bile juice which contains pigments and salts. The bile salts are responsible for the emulsification of the fats for digestion.
    Thus, the correct answer is option B. 
  • Question 8
    1 / -0
    Lacteal present in the villi of the small intestine
    Solution
    The villi and microvilli greatly increase the surface area of the small intestine and are supplied with a network of capillaries and a large lymph vessel called lacteal. The lacteal absorbs fatty acids and glycerol.
  • Question 9
    1 / -0
    Which one of the following is the matching set of gland and
    its secretion?
    Solution
    The pancreas and salivary gland make amylase (alpha amylase) hydrolyze dietary starch into disaccharides and trisaccharides, which are converted by other enzymes to glucose. Plants and some bacteria also produce amylase. Whereas thyroxin is secreted by the thyroid gland, Vasopressin is secreted by pituitary gland and secretin is secreted by the duodenum. Thus, the correct answer is option B.
  • Question 10
    1 / -0
    Substrate of amylase enzyme is
    Solution
    Hydrolases catalyse hydrolytic reactions. Some of the important hydrolases includes amylases, sucrase, lactase, maltase, protease, esterase etc. 
    Amylase catalyze hydrolysis of starch (polysaccharide form of glucose) into maltose (disaccharide of glucose).
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