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Digestion and Absorption Test - 60

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Digestion and Absorption Test - 60
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  • Question 1
    1 / -0
    The small intestine is descriptively divided into which three sections?
    Solution
    The absorption is done in the small intestine, it is further divided into duodenum, jejunum, and ileum, it takes the help of villi which helps increase the surface area of the intestine, so as to increase absorption.
    So, the correct option is 'duodenum, jejunum, ileum'.
  • Question 2
    1 / -0

    Sucrase is an enzyme found in:-
    Solution
    Sucrase enzymes are located on the brush border of the small intestine. The enzymes catalyze the hydrolysis of sucrose to fructose and glucose. The sucrase enzyme invertase, which occurs more commonly in plants, also hydrolyzes sucrose but by a different mechanism
    So, the correct option is 'Intestinal juice'
  • Question 3
    1 / -0

    The mouth aids in the digestive process by the action of :-
    Solution
    Saliva contains the digestive enzyme, amylase, which works on carbohydrate - starch, like bread to help break them down into simple sugars. Some digestion of fat also starts in the mouth when a small amount of lingual lipase is secreted and mixes with saliva
    So, the correct answer is 'All of these'
  • Question 4
    1 / -0

    Most of the digestion in human GIT takes place in
    Solution
    • Food that you consume in your diet contains carbohydrates, proteins and fats. Some digestion occurs in the stomach but mostly takes place in the small intestine. 
    • The purpose of the small intestine is to finish digestion and absorb nutrients.
    • The small intestine is where most chemical digestion takes place. 
    • Many of the digestive enzymes that act in the small intestine are secreted by the pancreas and liver and enter the small intestine via the pancreatic duct. Hence,  most of the digestion in human GIT takes place in the small intestine.
    So, the correct answer is 'small intestine'.
  • Question 5
    1 / -0

    Most of the absorption of the products of digestion takes place in humans across the
    Solution
    • The innermost layer lining the lumen of the alimentary canal is the mucosa. This layer forms irregular folds (rugae) in the stomach and small finger-like foldings called villi in the small intestine. 
    • The cells lining the villi produce numerous microscopic projections called microvilli giving a brush border appearance. These modifications increase the surface area enormously. 
    • Villi are supplied with a network of capillaries and a large lymph vessel called the lacteal. Hence, Most of the absorption of the products of digestion takes place in humans across the fingerlike villi of the small intestine
    So, the correct answer is 'fingerlike villi of the small intestine'.
  • Question 6
    1 / -0

    The first few centimeters of the duodenum are protected by a thick secretion of mucus from the
    Solution
    Brunner's gland in the duodenum secrete mucus. The mucus secreted by Brunner's gland is alkaline and helps to neutralize the acid chyme produced by the stomach, to produce chyme with a pH suitable for the digestive enzymes of the small intestine.
    So, the correct answer is 'goblet cells of duodenal (Brunner's) gland'
  • Question 7
    1 / -0

    Which of the following associations is incorrect?
    Solution
    • Trypsin is produced in the pancreas as an inactive protease trypsinogen. It is a protease found in the digestive system of many vertebrates, where it hydrolyses protein.
    • Amylase is a protein produced by the pancreas and by glands in and around mouth and throat. It helps you break down carbohydrates and starches into sugar.
    • Lipase is a protein produced by the pancreas. It is an enzyme that catalyses the hydrolysis of fats.
    • Pepsin is an endopeptidase produced in the stomach. It breaks down proteins into smaller peptides. Hence, the incorrect association is maltose-pepsin.
    So, the correct answer is 'Maltose-pepsin'.
  • Question 8
    1 / -0

    The sweet taste buds on the tongue are located at
    Solution
    The taste buds for sweet are on the tip of the tongue the salt taste buds are on either side of the front of the tongue. Sour taste buds are behind this and bitter taste buds are at the posterior end
    So, the correct answer is 'tip'
  • Question 9
    1 / -0

    The small intestine is designed for the digestion and absorption of nutrients, Which of the following greatly enhances the process?
    Solution
    •  The inner lining of the small intestine has numerous villi and microvilli and also circular folds which increase the surface area for absorption. 
    • The villi are richly supplied with blood vessels which take the absorbed food to each and every cell of the body. Hence, The small intestine is designed for the digestion and absorption of nutrients, Which of the following greatly enhances the process large surface area provided by the circular folds, villi, and microvilli.
    So, the correct answer is 'Large surface area provided by the circular folds, villi, and microvilli'.
  • Question 10
    1 / -0

    The acidic region of gastrointestinal tract is
    Solution
    • Parietal cells in the stomach secrete roughly two litres of acid a day in the form of hydrochloric acid. 
    • The acid in the stomach functions to kill bacteria, and to help digestion by solubilizing food. 
    • The acid is also important to maintain the optimal pH (between 1.8-3.5) for the function of the digestive enzyme pepsin. Hence, the acidic region of the gastrointestinal tract is the stomach.
    So, the correct answer is 'stomach'.
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