Overview of the Digestive System: Functions and Morphology
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Questions and Answers

What type of teeth are found in opisthoglyphous snakes?

  • Retractable fangs
  • No specialized fangs, just regular teeth
  • Fangs located at the front of the mouth
  • Fangs located at the back of the mouth (correct)

    • What is the main component of vertebrate tooth enamel?

  • Dentin
  • Organic matter
  • Cement
  • Inorganic matter (correct)

    • Which type of vertebrate teeth are typically used for securing food and grooming?

  • Incisors (correct)
  • Premolars
  • Canines
  • Molars

    • Which type of tooth attachment is found in most fishes and some lizards?

    <p>Acrodont</p> Signup and view all the answers

    Which vertebrate group may completely lack teeth?

    <p>Amphibians</p> Signup and view all the answers

    What is the primary function of tooth wear patterns in vertebrates?

    <p>Determining diet</p> Signup and view all the answers

    What is the term used to describe teeth that are continuously replaced throughout an organism's life?

    <p>Polyphyodont</p> Signup and view all the answers

    Which type of tooth morphology is characterized by teeth of different shapes along the jaw?

    <p>Heterodont</p> Signup and view all the answers

    What type of tooth morphology is characterized by high, tall crowns?

    <p>Hypsodont</p> Signup and view all the answers

    Which part of the pharynx includes the glottis, openings of the auditory tubes, and the entrance to the esophagus?

    <p>Laryngopharynx</p> Signup and view all the answers

    Which layer of the gut wall contains the smooth muscle layer?

    <p>Muscularis</p> Signup and view all the answers

    What is the term used to describe teeth with crescent-shaped surfaces?

    <p>Selenodont</p> Signup and view all the answers

    What is the primary function of the digestive system?

    <p>To break down and absorb nutrients from food</p> Signup and view all the answers

    Which of the following is NOT a component of the digestive tract?

    <p>Liver</p> Signup and view all the answers

    Which of the following is true about the tongue in mammals?

    <p>The tongue is specialized for suckling and mastication</p> Signup and view all the answers

    What is the main function of the salivary glands in mammals?

    <p>To produce enzymes for digestion</p> Signup and view all the answers

    Which of the following is true about the oral cavity in vertebrates?

    <p>Amphibians have a primary tongue with glandular fields and lateral lingual swellings</p> Signup and view all the answers

    What is the embryonic origin of the digestive tract?

    <p>The foregut, midgut, and hindgut</p> Signup and view all the answers

    Which part of the stomach secretes mucus to help neutralize acid in the stomach?

    <p>Pylorus</p> Signup and view all the answers

    What is the function of the gizzard in birds and crocodiles?

    <p>Mechanical breakdown of food</p> Signup and view all the answers

    Which region of the stomach is responsible for enzymatic breakdown of food in specialized herbivorous mammals?

    <p>Rumen</p> Signup and view all the answers

    What is the main function of the small intestine in vertebrates?

    <p>Digest lipids</p> Signup and view all the answers

    In which part of the intestine does the initial digestion of ptyalin, pepsin, and cellulase take place in vertebrates?

    <p>Duodenum</p> Signup and view all the answers

    What is the function of the cloaca in many vertebrates?

    <p>Storage of wastes</p> Signup and view all the answers

    Which vertebrate group lacks a cloaca?

    <p>Mammals</p> Signup and view all the answers

    What is the primary function of the liver in vertebrates?

    <p>Metabolism</p> Signup and view all the answers

    What is the main function of the pyloric caeca in most bony fishes?

    <p>Increasing passage time</p> Signup and view all the answers

    What is the digestive function of the abomasum in ruminants?

    <p>Digestion of plants</p> Signup and view all the answers

    What is the function of the papillary process?

    <p>It attaches the liver to the stomach's lesser curvature.</p> Signup and view all the answers

    Which of the following ligaments attaches the liver to the ventral abdomen?

    <p>Falciform ligament</p> Signup and view all the answers

    What is the role of the lesser omentum?

    <p>It extends from the liver to the stomach and duodenum.</p> Signup and view all the answers

    Which of the following animals lack a gallbladder?

    <p>Some rodents like rats and mice</p> Signup and view all the answers

    What is the primary function of the exocrine pancreas?

    <p>Discharging enzymes into the proximal gut</p> Signup and view all the answers

    How many pancreatic ducts do cats and humans share?

    <p>Two pancreatic ducts</p> Signup and view all the answers

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