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 (A)</p> Signup and view all the answers

Which vertebrate group may completely lack teeth?

<p>Amphibians (D)</p> Signup and view all the answers

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

<p>Determining diet (D)</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 (A)</p> Signup and view all the answers

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

<p>Heterodont (B)</p> Signup and view all the answers

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

<p>Hypsodont (B)</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 (B)</p> Signup and view all the answers

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

<p>Muscularis (C)</p> Signup and view all the answers

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

<p>Selenodont (A)</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 (D)</p> Signup and view all the answers

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

<p>Liver (C)</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 (A)</p> Signup and view all the answers

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

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

What is the embryonic origin of the digestive tract?

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

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

<p>Pylorus (D)</p> Signup and view all the answers

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

<p>Mechanical breakdown of food (B)</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 (A)</p> Signup and view all the answers

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

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

What is the function of the cloaca in many vertebrates?

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

Which vertebrate group lacks a cloaca?

<p>Mammals (A)</p> Signup and view all the answers

What is the primary function of the liver in vertebrates?

<p>Metabolism (A)</p> Signup and view all the answers

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

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

What is the digestive function of the abomasum in ruminants?

<p>Digestion of plants (C)</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. (A)</p> Signup and view all the answers

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

<p>Falciform ligament (D)</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. (D)</p> Signup and view all the answers

Which of the following animals lack a gallbladder?

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

What is the primary function of the exocrine pancreas?

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

How many pancreatic ducts do cats and humans share?

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

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