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Digestion and Absorption Test - 15

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Digestion and Absorption Test - 15
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Parotid salivary glands are present ____________.
    Solution
    The word parotid means around the ear. The parotid glands are a pair of serous salivary glands located inferior and anterior to the external acoustic meatus draining their secretions into the vestibule of oral cavity through Stensen duct or parotid duct.
  • Question 2
    1 / -0
    A lubricant mucin in saliva is made up of
    Solution
    The two major proteins present in saliva are amylase and mucin. It is a mucopolysaccharide or glycoprotein that is the chief constituent of mucus. It is present in most glands that secrete mucus and is the lubricant that protects body surfaces from friction or erosion.
  • Question 3
    1 / -0
    Ptyalin is an enzyme of
    Solution
    Ptylin is the salivary amylase or the enzyme of salivary juice that converts the starch into the dextrin and maltose. Its optimum pH is 5.6- 6.9 and prevents the minerals to dissolve from dental hard tissues by keeping mouth's pH slightly acidic.
  • Question 4
    1 / -0
    The pH of amylase present in saliva is
    Solution
    • Amylase is an enzyme that breaks starch down into sugar. 
    • Amylase is present in human saliva, where it begins the chemical process of carbohydrate digestion. 
    • In animals, it is a major digestive enzyme and its optimum pH is 6.7-7.0.
  • Question 5
    1 / -0
    The number of salivary glands in man is
    Solution
    • The salivary gland is an exocrine gland in the mouth that secretes saliva to lubricate the mouth and helps in the digestion and swallowing of food.
    • Humans have 3 pairs of salivary glands; the parotid, submaxillary and sublingual. 
    Thus, the correct answer is option B.
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  • Question 6
    1 / -0
    Ptyalin is
    Solution
    Ptylin is the salivary amylase that converts the starch into the dextrin and maltose. Its optimum pH is 5.6- 6.9 and prevents the minerals to dissolve from dental hard tissues by keeping mouth's pH slightly acidic. Thus, the correct answer is option B.
  • Question 7
    1 / -0
    Saliva is secreted by
    Solution
    Salivary gland is an exocrine gland in the mouth which secretes saliva to lubricate mouth and helps in digestion and swallowing of food. The salivary glands occur in three pairs namely parotid, submaxillary and sublingual located in the buccal cavity. 
    So, the correct answer is 'Submaxillary and sublingual glands'
  • Question 8
    1 / -0
    pH of the pancreatic juice is about
    Solution
    • The pancreas secretes pancreatic juice. The pancreatic juice contains the following enzymes trypsinogen, chymotrypsinogen, procarboxypeptidases, amylases, lipases and nucleases. 
    • The pH of the pancreatic juice is about 8.6(alkaline). It is alkaline because it has a high concentration of bicarbonate ions,
    • So, the correct answer is '8.6'.
  • Question 9
    1 / -0
    Which of the following is not a human salivary gland?
    Solution
    In rabbit there are four pairs of salivary glands: 1. parotid gland, 2. submaxillary gland, 3.sublingual gland and 4.infra orbital. The infra orbital gland is absent in human beings.
    So, the correct answer is 'Infra orbital'
  • Question 10
    1 / -0
    The trypsin enzyme is secreted by
    Solution
    Trypsin is produced in the pancreas as the inactive proenzyme trypsinogen. In the duodenum, trypsin catalyzes the hydrolysis of peptide bonds, breaking down proteins into smaller peptides. 
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