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Digestion and Absorption Test - 32

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Digestion and Absorption Test - 32
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  • Question 1
    1 / -0
    Pancreatic juice takes part in digestion of 
    Solution
    Pancreatic fluid or juice contains digestive enzymes, that pass to the small intestine, where they help to further break down the carbohydrates, proteins, and lipids (fats) in the chyme. Pancreatic juice contains a variety of enzymes including trypsinogen, chymotrypsinogen, elastase, carboxypeptidase, pancreatic lipase, nucleases, and amylase. Thus, it helps in digestion of proteins, fats and carbohydrates.
  • Question 2
    1 / -0
    Chymotrypsin is 
    Solution
    • Chymotrypsin is a proteolytic digestive enzyme component of pancreatic juice acting in the duodenum, where it performs proteolysis, the breakdown of proteins and polypeptides. 
    • Digestion of protein is completed in the small intestine by the pancreatic enzymes trypsin, chymotrypsin, and carboxypeptidase. Hence, Chymotrypsin is a proteolytic enzyme.
    So, the correct answer is 'proteolytic enzyme'.
  • Question 3
    1 / -0
    Trypsinogen is secreted by
    Solution
    Pancreatic juice and bile are released through the hepato-pancreatic duct. The pancreatic juice contains inactive enzymes trypsinogen, chymotrypsinogen, procarboxypeptidases, amylases, lipases and nucleases. Trypsinogen is activated by an enzyme, enterokinase, secreted by the intestinal mucosa into active trypsin, which in turn activates the other enzymes in the pancreatic juice.
  • Question 4
    1 / -0
    Some proteolytic enzymes are
    Solution
    Trypsin is a proteolytic enzyme of the pancreatic juice capable of converting proteins into peptones. It is secreted as an inactive zymogen trypsinogen. Erepsin is an enzyme complex found in intestinal and pancreatic juices that functions in the breakdown of polypeptides into amino acids. Pepsin is an enzyme produced in the stomach.  In the presence of hydrochloric acid, it splits proteins into proteoses and peptones.
  • Question 5
    1 / -0
    Ptyalin cannot work in stomach, because it becomes
    Solution
    The amylase of the salivary gland (ptyalin) is inactivated by stomach acid. When food enters the stomach it is first stored in the fundus of the stomach and not mixed with acid, so ptyalin can carry on acting until mixing with stomach acid takes place. Amylase works in the pH of 6.9, whereas the pH in stomach is 2. Amylase cannot work under such acidic pH.
  • Question 6
    1 / -0
    Which one is differ from the category of other three?
    Solution
    The ptyalin is an enzyme, rest three are hormones. The saliva secreted into the oral cavity contains electrolytes ($$Na^+$$, $$K^+$$, $$Cl^-$$, $$HCO_3^-$$) and enzymes, salivary amylase (Ptyalin) and lysozyme. The chemical process of digestion is initiated in the oral cavity by the hydrolytic action of the carbohydrate splitting enzyme, the salivary amylase (ptyalin). About 30 per cent of starch is hydrolysed here by this enzyme (optimum pH 6.8) into a disaccharide maltose. Lysozyme present in saliva acts as an antibacterial agent, that prevents infections.
  • Question 7
    1 / -0
    Which reserve a starving man first consumed?
    Solution
    Starvation mode is a state in which the body is responding to prolonged periods of low energy intake levels. The body responds to reduced energy intake by burning fat reserves and consuming muscle and other tissues. Specifically, the body burns fat after first exhausting the contents of the digestive tract along with glycogen reserves stored in muscle and liver cells. After prolonged periods of starvation, the body will utilize the proteins within muscle tissue as a fuel source.
  • Question 8
    1 / -0
    Digestion of carbohydrate is affected by
    Solution
    Amylopsin is the starch digesting amylase produced by the pancreas and present in pancreatic juice.
    Lipase is any of a class of enzymes that breakdown fats. Lipase is produced by the liver, pancreas, and other digestive organs or by certain plants.
    Erepsin is an enzyme complex found in intestinal and pancreatic juices, that functions in the breakdown of polypeptides into amino acids.
    Pepsin is an enzyme, produced in the stomach, that in the presence  of hydrochloric acid splits proteins into proteoses and peptones.
  • Question 9
    1 / -0
    Absorption of digested food chiefly occurs in 
    Solution
    The majority of digestion and absorption of food stuffs takes place chiefly in the convoluted tube of the small intestine. The small intestine has been especially modified for this absorptive process. The predominant modification is in the form of villi (finger-like projections), which vastly increase the surface area of the intestine.
  • Question 10
    1 / -0
    The enzyme trypsinogen is secreted from
    Solution
    Trypsinogen is the precursor form or zymogen of the pancreatic enzyme trypsin. It is found in pancreatic juice. It is activated by enteropeptidase, which is found in the intestinal mucosa, to form trypsin.
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