BIO3114 Biology - Topic 8: Digestive System
29 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary purpose of chemical digestion in food processing?

  • Passing undigested material out of the body
  • Breaking food into smaller pieces
  • Uptake of nutrients by body cells
  • Hydrolyzing polymers into monomers (correct)

    • Which stage of food processing involves the uptake of nutrients by body cells?

  • Mechanical fragmentation
  • Absorption (correct)
  • Elimination
  • Chemical digestion

    • In the digestive system, what is responsible for pushing food along the tract?

  • Absorption
  • Digestive enzymes
  • Peristalsis (correct)
  • Large intestine

    • Which part of the digestive system is responsible for final digestion and nutrient absorption?

    <p>Small intestine</p> Signup and view all the answers

    How long does food typically spend in the stomach for partial digestion?

    <p>2 - 6 minutes</p> Signup and view all the answers

    What is the function of peristalsis in the digestive system?

    <p>Pushing food along the digestive tract</p> Signup and view all the answers

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

    <p>Aiding in digestion and absorption of fats</p> Signup and view all the answers

    Which part of the small intestine mainly functions in the absorption of nutrients and water?

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

    What is the role of hormones in the gastrointestinal (GI) tract?

    <p>Coordination of digestive juices secretion</p> Signup and view all the answers

    What is the adaptation in the small intestine that greatly increases the rate of nutrient absorption?

    <p>Villi and microvilli on the surface</p> Signup and view all the answers

    Which structure in the small intestine contains a network of blood vessels and a lacteal?

    <p>Villus core</p> Signup and view all the answers

    What is the function of microvilli in the small intestine?

    <p>Absorption of nutrients</p> Signup and view all the answers

    How often is the epithelium in the stomach completely replaced by mitosis?

    <p>Every three days</p> Signup and view all the answers

    What is the major cause of gastric ulcers according to Dr. Vinibha?

    <p>Helicobacter pylori bacterium</p> Signup and view all the answers

    Which part of the small intestine is the longest?

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

    What digestive juices mix with acid chyme in the duodenum?

    <p>Pancreatic juice, liver bile</p> Signup and view all the answers

    Which organ produces proteases trypsin and chymotrypsin for digestion?

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

    Where is bile produced and stored until needed?

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

    What is a key characteristic of filter feeding?

    <p>Straining small organisms from the surrounding medium</p> Signup and view all the answers

    Which of the following animals is an example of a filter feeder?

    <p>Humpback whale</p> Signup and view all the answers

    What do substrate feeders do?

    <p>Live in or on their food source</p> Signup and view all the answers

    How do filter feeders obtain their food?

    <p>By filtering small organisms from the environment</p> Signup and view all the answers

    What is the function of the comblike plates called baleen in filter feeding animals?

    <p>To remove small invertebrates and fish from water</p> Signup and view all the answers

    What is the function of chylomicrons formed in the epithelial cells?

    <p>Transport fatty acids to the liver</p> Signup and view all the answers

    What do chylomicrons consist of when they are formed in the small intestine?

    <p>Phospholipids, cholesterol, and proteins</p> Signup and view all the answers

    Which vessel transports chylomicrons into a lacteal in each villus?

    <p>Lymphatic vessels</p> Signup and view all the answers

    What occurs as wastes move through the colon?

    <p>They lose water content</p> Signup and view all the answers

    In the large intestine, why do herbivores generally have longer alimentary canals than carnivores?

    <p>To accommodate longer digestion of vegetation</p> Signup and view all the answers

    Which bacterium resides in the colon and is known for producing various vitamins?

    <p>E. coli</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser