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Digestion and Absorption Test - 74

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Digestion and Absorption Test - 74
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  • Question 1
    1 / -0
    Cardiac sphincter prevents the movement of food from  
    Solution
    • The cardiac sphincter, a circular muscle between the oesophagus and stomach, closes after food enters the stomach and prevents food from going back up into the oesophagus. 
    • In some people, the cardiac sphincter does not function properly or it becomes weakened. 
    • This leads to contents from the stomach leaking back into the oesophagus. 
    • Stomach acids can irritate the oesophagus and cause symptoms of heartburn. 
    Thus, the correct answer is option D.
  • Question 2
    1 / -0
    Hastate plate is present in which part of the alimentary canal?
    Solution
    The large triangular plate present in the mid floor of the cardiac stomach is called as hastate plate because of its shape like a head of the spear. Its upper surface has a thick growth of delicate setae and has a median ridge with gradually sloping sides. 
  • Question 3
    1 / -0
    Excessive stimulation of vagus nerve in humans may lead to
    Solution
    Excessive stimulation of vagus nerve in humans may impair the normal control mechanisms that modulate the gastric acid secretion. Excessive secretion of peptic acid can lead to ulceration. It is the painful sore in the inner lining of the stomach and small intestine.
  • Question 4
    1 / -0
    Wharton's duct is the duct of
    Solution
    The submandibular duct or Wharton duct or submaxillary duct is one of the salivary excretory ducts. It drains saliva from each bilateral submandibular gland and sublingual gland to the sublingual caruncle at the base of the tongue.
  • Question 5
    1 / -0
    Ptyalin prefers--------------media.
    Solution
    The saliva contains ptyalin, which starts degrading the starch. It is an enzyme, that breaks the bond joining two sugars together and forms fragments of soluble starches. The stomach is highly acidic and these conditions are very unfavorable for ptyalin, which prefers a high pH (low acidity), neutral for activity. Overall, the ptyalin only degrades a small amount of the total starch in the diet. The rest is degraded by a pancreatic amylase.
  • Question 6
    1 / -0
    Largest salivary gland is 
    Solution
    A. CORRECT ANSWER- C
    B. EXPLANATION FOR THE CORRECT ANSWER

    • The parotid glands are a pair of major salivary glands are located between the ear and the ascending branch of the lower jaw.
    • They secrete saliva to facilitate mastication and swallowing and to begin the digestion of starches. It is the serous type of gland, which secretes the ptyalin. 
  • Question 7
    1 / -0
    The digestion of starch by amylase is completed in the 
    Solution
    The digestion of starch begins with the action of salivary alpha-amylase (ptyalin), and pancreatic amylase in the small intestine. Digestion and absorption of carbohydrates is fast and takes place usually in the upper small intestine (duodenum). The absorption of most digested food occurs in the small intestine through the brush border of the epithelium covering the villi.
  • Question 8
    1 / -0
    Sericteries are modified
    Solution
    Silkworms possess a pair of specially modified salivary glands called as sericteries, which are used for the production of a clear, viscous, proteinaceous fluid, that is forced through openings called as spinnerets on the mouth part of the larva. As the fluid comes into contact with the air it hardens. 
  • Question 9
    1 / -0
    Mumps is the painful condition of
    Solution
    Mumps is caused by a virus that is passed from one person to another through saliva, nasal secretions, and close personal contact. The condition primarily affects the parotid glands. The hallmark symptom of mumps is swelling of the salivary glands.
  • Question 10
    1 / -0
    Brunner's gland are characteristic of
    Solution
    Brunner's glands are found in a part of the digestive system known as the duodenum. It is the compound of submucosa of the duodenum. The duodenum is the section of gut through which food passes after leaving the stomach. These glands produce alkaline mucus, which neutralizes the acid from the stomach as it enters the duodenum. As long as Brunner's glands function normally, this mucus helps protect the duodenal lining.
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