Dietary Fiber Quiz

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Questions and Answers

What are the two types of dietary fiber?

  • Digestible and indigestible fiber
  • Natural and synthetic fiber
  • Soluble and insoluble fiber (correct)
  • Simple and complex fiber

What do bulking fibers do as they move through the digestive system?

  • Stimulate appetite
  • Slow down digestion
  • Increase acidity in the stomach
  • Absorb water, easing defecation (correct)

Which component of dietary fiber can be attacked by bacteria in the intestine?

  • Insoluble polysaccharides (correct)
  • Lignin
  • Resistant starch
  • Inulin

Which of the following is a non-starch polysaccharide found in dietary fiber?

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

What is the physiological activity of soluble fiber in the colon?

<p>Readily fermented into gases and physiologically active byproducts (B)</p> Signup and view all the answers

Which of the following is an example of soluble fiber?

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

What is the physiological activity of insoluble fiber in the large intestine?

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

Which of the following is a metabolically inert component of dietary fiber?

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

Which non-starch polysaccharide is a component of dietary fiber that can be attacked by bacteria in the intestine?

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

What is the main characteristic of bulking fibers as they move through the digestive system?

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

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Study Notes

Types of Dietary Fiber

  • There are two types of dietary fiber: soluble fiber and insoluble fiber.

Physiological Activity of Fiber in the Digestive System

  • Bulking fibers absorb water and expand as they move through the digestive system, helping to regulate bowel movements and prevent constipation.
  • Soluble fiber is fermented by bacteria in the colon, producing short-chain fatty acids and promoting the growth of beneficial gut microbiota.
  • Insoluble fiber absorbs water and helps to move food through the digestive system, promoting regular bowel movements.

Characteristics of Fiber Components

  • Pectin is a non-starch polysaccharide found in dietary fiber.
  • Soluble fiber is fermented by bacteria in the intestine, producing beneficial byproducts.
  • Cellulose is a metabolically inert component of dietary fiber.
  • Fructans are a type of non-starch polysaccharide that can be attacked by bacteria in the intestine.

Key Characteristics of Fiber Types

  • Soluble fiber is characterized by its ability to be fermented by bacteria in the colon, promoting beneficial gut microbiota.
  • Insoluble fiber is characterized by its ability to absorb water and promote regular bowel movements.
  • Bulking fibers are characterized by their ability to absorb water and expand as they move through the digestive system.

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