Soluble Dietary Fibers Quiz
32 Questions
1 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 main characteristic of soluble dietary fibers?

  • They are easily absorbed by the body and do not contribute to bacterial growth
  • They form a gel-like material and are almost completely fermented in the colon (correct)
  • They are not soluble in water and remain intact in the colon
  • They have no impact on stool weight or bacterial mass
  • Why are soluble fibers important for stool weight enhancement?

  • They increase bacterial mass in the colon (correct)
  • They provide direct nutrition to the body
  • They slow down the fermentation process in the colon
  • They lower the pH level in the colon
  • What is the primary composition of pectin compounds?

  • D-Mannose
  • D-Fructose
  • D-Galacturonic acid (correct)
  • D-Glucose
  • How do pectin compounds influence small intestine transit time?

    <p>They slow down small intestine transit time due to their gelling properties</p> Signup and view all the answers

    What is the structure of pectin?

    <p>Heteropolymer consisting of galacturonic acid linked by α-1,4 bonds and substituted with rhamnopyranose units</p> Signup and view all the answers

    How does soluble fiber affect feces excretion?

    <p>Very little soluble fiber is excreted in the feces due to high breakdown by colon microflora</p> Signup and view all the answers

    What is the main physiological effect of pectin?

    <p>Improved plasma glucose and cholesterol levels</p> Signup and view all the answers

    What is the most abundant source of pectin?

    <p>Citrus fruits</p> Signup and view all the answers

    How is pectin broken down in the gastrointestinal tract?

    <p>Through fermentation by colon microorganisms</p> Signup and view all the answers

    Which microorganisms ferment pectin in the colon?

    <p>Bifidobacteria and Lactobacillus</p> Signup and view all the answers

    What functional properties of guar gum contribute to lowering the risk of developing atherosclerosis?

    <p>Enhanced cholesterol clearance from the blood circulatory system</p> Signup and view all the answers

    How does dietary guar gum impact glucose sensitivity?

    <p>Increases glucose sensitivity</p> Signup and view all the answers

    What is the basic mechanism behind the hypocholesterolemic effects of guar gum?

    <p>Reduction in free cholesterol in the liver</p> Signup and view all the answers

    How does pectin contribute to reducing diarrhea intensity in children and infants?

    <p>By reducing the numbers of pathogenic bacteria such as Klebsiella and Salmonella</p> Signup and view all the answers

    What is the primary ability of pectin that allows it to trap nutrients and reduce their absorption from the GIT?

    <p>Ability to form a gel or thickened solution</p> Signup and view all the answers

    What functional property of guar gum makes it an ingredient of choice in the formulation of functional foods for treatment of cholesterol-related cardiovascular diseases?

    <p>Guar gum has hypocholesterolemic effects in animals and humans</p> Signup and view all the answers

    How does pectin influence small intestine transit time?

    <p>Pectin may slow gastric emptying and influence small intestine transit time due to its gelling properties.</p> Signup and view all the answers

    What is the main physiological effect of soluble dietary fibers?

    <p>They enhance stool weight due to increased growth of bacteria.</p> Signup and view all the answers

    What is the primary composition of pectin compounds?

    <p>Pectin compounds are primarily composed of D-Galacturonic acid.</p> Signup and view all the answers

    Why are soluble fibers important for stool weight enhancement?

    <p>Soluble fibers are important for stool weight enhancement because they support increased growth of bacteria.</p> Signup and view all the answers

    What is the structure of pectin?

    <p>It is a heteropolymer consisting of a backbone of linear galacturonic acids linked by α-1,4 bonds and substituted with α-1,2 rhamnopyranose units that contain side chains of neutral sugars such as glucose, mannose, xylose, and galactose.</p> Signup and view all the answers

    How is pectin broken down in the gastrointestinal tract?

    <p>Pectin is digested almost completely by colonic bacteria.</p> Signup and view all the answers

    What are the main physiological effects of pectin?

    <p>Improved plasma glucose, cholesterol, and total lipid profiles</p> Signup and view all the answers

    How does pectin contribute to the prevention of chronic diseases?

    <p>By helping in the prevention of obesity, diabetes, atherosclerosis, and cancer</p> Signup and view all the answers

    What are the functional properties of dietary guar gum in improving cardiovascular health?

    <p>Decreasing fasting blood glucose, cholesterol, triacylglycerol, systolic blood pressure and diastolic blood pressure</p> Signup and view all the answers

    How does dietary guar gum contribute to lowering the risk of developing atherosclerosis?

    <p>By enhancing cholesterol clearance from the blood circulatory system</p> Signup and view all the answers

    What microorganisms ferment pectin in the colon?

    <p>Acid-producing bacteria, Bifidobacteria, and Lactobacillus</p> Signup and view all the answers

    What are the health benefits of guar gum consumption for insulin-dependent diabetics?

    <p>Increases in glucose sensitivity and ratio of LDL cholesterol to HDL-cholesterol</p> Signup and view all the answers

    How does pectin reduce the absorption of nutrients from the GIT?

    <p>By forming a gel or thickened solution that traps nutrients</p> Signup and view all the answers

    What is the basic mechanism behind the hypocholesterolemic effects of guar gum?

    <p>The ability to reduce concentration of free cholesterol in the liver</p> Signup and view all the answers

    What is the primary ability of pectin that allows it to trap nutrients and reduce their absorption from the GIT?

    <p>Ability to form a gel or thickened solution</p> Signup and view all the answers

    How does the resultant increased acidity from pectin fermentation benefit intestinal health?

    <p>It could be lethal to pathogenic microorganisms</p> Signup and view all the answers

    Use Quizgecko on...
    Browser
    Browser