Digestion and Absorption

Digestion and Absorption

Moderate Questions
Difficult Questions

Advanced Zoology

Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration
Human Reproduction
Human Health and Disease
Biotechnology Principles and Processes
Biomolecules (Zoology)
Evolution (Zoology)
Biotechnology and its Applications
Reproductive Health
  1. In the stomach, gastric acid is secreted by the








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    The main constituent of gastric acid is hydrochloric acid which is produced by parietal cells (also called oxyntic cells) in the gastric glands in the stomach.

    Correct Option: B

    The main constituent of gastric acid is hydrochloric acid which is produced by parietal cells (also called oxyntic cells) in the gastric glands in the stomach.

  1. A healthy person eats the following diet - 5 gm raw sugar, 4 gm albumin, 10 gm pure buffalo ghee adultrated with 2 gm vegetable ghee (hydrogenated vegetable oil) and 5 gm lignin. How many calories he is likely to get?








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    Physiological value of carbohydrates is 4.0 kcal/g, proteins 4.0 kcal/g and of fats is 9.0 kcal/g. Hence,
    5 g raw sugar will yield 5 × 4.0 = 20.0 kcal
    4 g albumin (protein) will yield 4 × 4.0
    = 16.0 kcal
    10 + 2 g of fat will yield 12 × 9.0 = 108.0 kcal
    Total yield = 144 kcal.

    Correct Option: A

    Physiological value of carbohydrates is 4.0 kcal/g, proteins 4.0 kcal/g and of fats is 9.0 kcal/g. Hence,
    5 g raw sugar will yield 5 × 4.0 = 20.0 kcal
    4 g albumin (protein) will yield 4 × 4.0
    = 16.0 kcal
    10 + 2 g of fat will yield 12 × 9.0 = 108.0 kcal
    Total yield = 144 kcal.

  1. Which enzymes are likely to act on the baked potatoes eaten by a man, starting from the mouth and as it moves down the alimentary canal?








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    Chemical process of digestion starts in the oral cavity by the hydrolytic action of the carbohydrate splitting enzyme, the salivary amylase. Carbohydrates in the chyme are hydrolysed by pancreatic amylase into disaccharides.

    Correct Option: D

    Chemical process of digestion starts in the oral cavity by the hydrolytic action of the carbohydrate splitting enzyme, the salivary amylase. Carbohydrates in the chyme are hydrolysed by pancreatic amylase into disaccharides.

  1. Secretin and cholecystokinin are two hormones involved in digestion. They are secreted by








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    Duodenum.

    Correct Option: A

    Duodenum.

  1. Duodenum has characteristic Brunner’s gland which secrete two hormones called








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    Secretin released by duodenal cells inhibits movement in gastrointestinal tract. Cholecystokinin stimulates release of pancreatic enzymes. Prolactin is a hormone released by anterior pituitary. Parathormone is released by parathyroid glands. Estradiol is released by ovary and progesterone is released by corpus luteum.

    Correct Option: B

    Secretin released by duodenal cells inhibits movement in gastrointestinal tract. Cholecystokinin stimulates release of pancreatic enzymes. Prolactin is a hormone released by anterior pituitary. Parathormone is released by parathyroid glands. Estradiol is released by ovary and progesterone is released by corpus luteum.