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Digestion and Absorption Test - 73

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Digestion and Absorption Test - 73
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  • Question 1
    1 / -0
    Which is the characteristic lining of stomach of mammals

    Solution
    The mucosa is highly folded and the single-layered mucous membrane of the in foldings forms tubular and and often branched gastric gland in the lamina propria. Each gland has three types of secretory cells - neck cells, oxyntic cells, zymogen cells.
  • Question 2
    1 / -0
    The cup-shaped cavity for the articulation of the head of the
    femur is called

    Solution
    Acetabulum is made up of Parts of ilium, ischium and pubis. It provides articulation for head of femur.
  • Question 3
    1 / -0
    Starch splitting enzyme is secreted by
    Solution
    Starch-splitting enzyme (ptyalin) is secreted into the mouth by salivary glands. It lubricates ingested food, and begins the breakdown of starches.
  • Question 4
    1 / -0
    The chyle contains
    Solution
    The digested food called as chyle, contains simple sugars like glucose, amino acids, minerals, fatty acids and glycerol ,water etc. All micromolecules except fatty acids and glycerol are absorbed by the blood capillaries by simple diffusion. Thus sugars, amino acids etc. are absorbed into blood. The fatty acid and glycerol molecules are not taken by blood. They are absorbed by lacteals (lymphatic vessels). 
  • Question 5
    1 / -0
    Achalasia is a condition related to digestive tract which means
    Solution
    Achalasia is a motility disorder in which the esophagus (food tube) empties slowly. It is associated with the loss of the normal, orderly muscle activity (peristalsis) of the esophagus. Achalasia results from the nerves in the esophagus and lower esophageal valve being damaged or destroyed which leads to the failure os relaxation of the esophageal sphincter.
  • Question 6
    1 / -0
    N-Acetyl muramidase, active in saliva and is microbicidal, was discovered by
    Solution
    • N-acetyl muramidase is also called as lysozyme.
    •  This Lysozyme was discovered by Alexander Fleming in 1921 when he demonstrated that his own nasal mucus had the ability to inhibit the growth of a certain strain of bacteria in culture.
    • This enzyme is found in the secretions of the lacrimal glands and in nasal mucus, gastric secretions, and egg white. 
    • It catalyzes the breakdown of certain carbohydrates found in the cell walls of certain bacteria (e.g., cocci). Hence, N-Acetyl muramidase, active in saliva and is microbicidal, was discovered by Alexander Fleming.
    So, the correct answer is 'Fleming'.
  • Question 7
    1 / -0
    Match the columns.
    List IList II
    AStomach1This organ secretes the chemical bile, which is used to emulsify fats.
    BLarge intestine2This organ absorbs most of the water from the undigested food.
    CSmall intestine3This organ is the section of the alimentary canal where most of the food is absorbed into the blood.
    DLiver4The structure is the site where the chemical breakdown of proteins first occurs.
    Solution
    The stomach starts chemical digestion of protein. The enzyme pepsin is responsible for protein breakdown. The large intestine is primarily responsible for removing water from the contents of the intestine and making it ready for removal from the body. The small intestine is the part of the intestines where 90% of the digestion and absorption of food occurs. The main function of the small intestine is absorption of nutrients and minerals from food. Liver is an accessory digestive gland and produces bile, an alkaline compound which aids in digestion via the emulsification of lipids. 
  • Question 8
    1 / -0
    Serous glands located on the tongue are
    Solution
    Von Ebner's glands, also called Ebner's glands or gustatory glands, are exocrine glands found in the mouth. They are serous salivary glands, which are found just anterior to the posterior third of the tongue, anterior to the terminal sulcus.
  • Question 9
    1 / -0
    Modified part of ............. is the gizzard of the grain eater birds.
    Solution
    A bird digestive system contains crop, which is an expanded, saclike portion of the digestive tract below the oesophagus, in which food is temporarily stored is the gizzard which is also called as the gastric mill, ventriculus. In this organ the churning, digestion and temporary storage of food take place. It is the modified form of true stomach and found in some animals like birds, alligators. 
    So, the correct answer is option C.
  • Question 10
    1 / -0
    In which part of the body, are argentaffin cells found?
    Solution
    Argentaffin cells are the round shaped epithelial found in the lining of the digestive tract such as gastric glands in the stomach wall. It is found in all parts of the alimentary canal but mostly occurs in the small intestine. As the granules of these cells precipitate the silver from silver nitrate solution it is called as argentaffin cells. 
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