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Digestion and Absorption Test - 49

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Digestion and Absorption Test - 49
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Large intestine has ______
    Solution
    Food is digested in three steps i.e mouth, stomach and small intestine. The undigested food is passed through large intestine. Large intestine larger diameter as compared to small intestine but is smaller in length.
  • Question 2
    1 / -0
    Exit through large intestine is regulated by ______
    Solution
    Undigested waste is collected in large intestine and stored in rectum. It is excreted through anus. Sphincter muscle regulated the excretion of waste products from our body.
    So, the correct answer is 'Sphincter muscle'
  • Question 3
    1 / -0
    Which symptoms are commonly seen in case of diarrhea?
    Solution
    Signs and symptoms associated with diarrhea may include: frequent loose watery stools, abdominal cramps, abdominal pain, fever, blood in the stool, bloating, etc. 
  • Question 4
    1 / -0
    Choose the correct statement for the given structure shown in figure.

    Solution
    The image represents a vilus which are fingerlike projections of the mucosa into the lumen of the small intestine. Each villus has an outer layer of epithelial cells which in turn has thousands of microscopic extensions called microvilli (D). A villus has the rich supply of blood capillaries (B) and a small lymphatic capillary, called a lacteal (A). The whole structure serves to increase the surface area for absorption of digested food. Thus, the correct answer is A. 
  • Question 5
    1 / -0
    Which one of the following is not a step during digestion process?
    Solution
    • The chemical breakdown of complex biological molecules into their component parts like lipids into fatty acids, proteins to individual amino acids, carbohydrates into simple sugars.
    • Digestion includes 5 phases :
    1. Ingestion.
    2. Movement.
    3.  Digestion.
    4.  Absorption. 
    5. Further digestion. Hence, the following step not involved during the digestion process is acid processing.
    So, the correct answer is 'acid processing'.
  • Question 6
    1 / -0
    The site where the digestion of starch begins is

    Solution
    In the diagram, label number $$1$$ shows oral cavity. The digestion of starch is initiaited in the oral cavity where carbohydrates are partially digested into shorter chains of glucose called polysaccharides, as well as a disaccharide consisting of two glucose molecules called maltose by amylase. Amylase is present in the salive secreted by salivary glands in the oral cavity.
    So, option A is the correct answer.
  • Question 7
    1 / -0
    Lowest pH is found in
    Solution
    The gastric glands of stomach produce gastric juice, which contains pepsinogen, HCl, and mucus. HCl imparts highly acidic pH to stomach which in turn supports conversion of inactive pepsinogen into active pepsin. The proper acidic environment of stomach triggers the opening of one way pyrrolic sphincter which in turn allow the chyme to move into the small intestine for further digestive processes. Thus, the correct answer is option C.
  • Question 8
    1 / -0
    Starch digestion begins in
    Solution
    Digestion of starch by salivary amylase into maltose starts in the mouth. Oesophagus serves to push the food into stomach only. No digestion takes place here. Gastric juice of stomach digest the protein part of food but no absorption takes place. Pancreatic amylase also digests starch into maltose sugars. Intestinal maltase carries out final chemical digestion of maltose into glucose molecules. The simpler substances formed by chemical digestion are then absorbed by small intestinal villi. The Large intestine is the organ of water and salts reabsorption from undigested food and elimination of remaining undigested material out of the body. This makes option E correct answer. 
  • Question 9
    1 / -0
    The structure shown in the figure is described by

    Solution
    The above structure is of villi. Millions of them line the small intestine and give the lining of the small intestine a fuzzy appearance, called a brush border. They provide large surface area so there will be the most efficient absorption of fatty acids and glycerol into the blood stream. 
    Therefore, the correct answer is option A.
  • Question 10
    1 / -0
    The function of bicarbonate ion in digestive tract is to
    Solution
    When the acidic chyme enters into the small intestine from stomach, stomach secretes bicarbonate ions in a large amount in the intestine. It acts as a buffer to break down and dilute the acidic content and increases the pH of the chyme. So, that pancreatic digestive enzyme becomes active for further digestion. 
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