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Digestion and Absorption Test - 9

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Digestion and Absorption Test - 9
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  • Question 1
    1 / -0
    Milk protein is acted upon by a gastric enzyme
    Solution
    In young mammals, milk protein caseinogens are digested with the help of an enzyme called rennin. HCl converts prorennin into active rennin. Rennin curdles milk protein caseinogen, which is hydrolyzed into casein and lastly to calcium paracasein. 
  • Question 2
    1 / -0
    The function of tongue is to
    Solution
    In humans the tongue helps in the ability to taste, serves as a muscle that pushes chewed food into the throat while mixing with saliva. The tongue also assists with speech for humans. 
  • Question 3
    1 / -0
    A specialized structure in intestine that helps in absorption is
    Solution
    1. The innermost layer lining the lumen of the alimentary canal is the mucosa.
    2. This layer forms irregular folds (rugae) in the stomach and small finger-like foldings called villi in the small intestine.
    3. The cells lining the villi produce numerous microscopic projections called microvilli giving a brush border appearance found on the apical surface of some epithelial cells. 
    4. These modifications increase the surface area enormously and help in secretion and absorptionHence, the specialized structure in the intestine that helps in absorption is villi.
    So, the correct answer is 'villi'.
  • Question 4
    1 / -0
    Coelenterates are _________.
    Solution
    • Phylum Coelenterata consists of aquatic, freshwater or marine organisms. 
    • They are usually found attached to the rocks at the bottom of the sea. These are the multicellular and simplest group of invertebrate animals, found in colonies or solitarily. Hence, Option B is correct.
  • Question 5
    1 / -0
    Which one of the following pairs of food components in humans reaches the intestine totally undigested?
    Solution
    Humans do not have the enzyme cellulase to degrade the beta 1, 4 bonds of cellulose. In the large intestine, bacteria may partially degrade some cellulose. Lipids or fats are digested and absorbed in the small intestine.
  • Question 6
    1 / -0
    Digestion of starch takes place in
    Solution
    • Carbohydrate digestion begins in the mouth. The salivary glands in the mouth secrete saliva, which helps to moisten the food.
    • The food is then chewed while the salivary glands also release the enzyme salivary amylase, which begins the process of breaking down the polysaccharides in the carbohydrate food.
    • But this activity is much less important than that of pancreatic amylase in the small intestine which digests carbohydrates. Hence, Digestion of starch takes place in the buccal cavity and small intestine.
    So, the correct answer is 'buccal cavity and small intestine'.
  • Question 7
    1 / -0
    The enzyme added to the starch solution for its break down may have been
    Solution
    Salivary amylase is an enzyme that breaks starch down into sugar and is present in human saliva, where it begins the chemical process of digestion.
  • Question 8
    1 / -0
    Mode of infection in diarrhoea is
    Solution
    1. Diarrhea is the condition of having at least three loose or liquid bowel movements each day. It often lasts for a few days and can result in dehydration due to fluid loss.
    2.  Signs of dehydration often begin with loss of the normal stretchiness of the skin and irritable behavior. This can progress to decreased urination, loss of skin color, a fast heart rate and a decrease in responsiveness as it becomes more severe. 
    3. These infections are often acquired from food or water that has been contaminated by feces, or directly from another person who is infected. Hence, the mode of infection of diarrhea is food.

    So, the correct answer is 'food'.
  • Question 9
    1 / -0
    The semi-digested food that moves down the oesophagus is known as______.
    Solution
    Bolus is the food that has been chewed and mixed with saliva in the mouth. The food is reduced to smaller size and saliva adds water, digestive enzymes and mucus (semi-digested); which aids for easy swallowing through the oesophagus.
    Hence, the correct option is "A".
  • Question 10
    1 / -0
    Which of the following is a protein deficiency disease?
    Solution
    Kwashiorkor is a PEM (Protein Energy Malnutrition) observed in children of the age group of 1-5 years. Wasted muscles, thin limbs, retarded growth of body and brain, swelling of legs due to retention of water, reddish hair, pot belly and diarrhea are the symptoms seen in such people.
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