Gut Microbes and Sugar Fermentation

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Questions and Answers

Which of the following is NOT a byproduct of fructose fermentation in the large intestine?

  • Glucose (correct)
  • Hydrogen
  • Lactic acid
  • Methane

What is the main purpose of the microbes in the gut regarding undigested sugars?

  • To convert them into glucose for energy.
  • To release them back into the bloodstream.
  • To degrade them in the large intestine. (correct)
  • To increase the absorption of sugars in the small intestine.

What is the major source of intestinal gas?

  • The breakdown of proteins in the stomach.
  • The absorption of water in the colon.
  • Swallowing air during eating.
  • Fermentation of undigested sugars in the colon. (correct)

Which of these conditions can be caused by excess fructose fermentation in the large intestine?

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

What is the role of 'normal flora' in the human gut?

<p>To aid in degrading undigested sugars. (B)</p> Signup and view all the answers

Flashcards

Normal Flora

Microorganisms residing in the gut that aid digestion.

Fermentation

The process by which gut microbes break down undigested sugars.

Excess Fructose

When too much fructose reaches the large intestine.

Byproducts of Fermentation

Gases produced by gut microbes, including lactic acid and methane.

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Gut Gas Symptoms

Results from fermentation include bloating and pain.

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Study Notes

Gut Microbes and Sugar Fermentation

  • Gut microbes (normal flora) aid in breaking down undigested sugars in the large intestine.
  • Excess fructose can reach the large intestine.
  • Colonic flora ferment fructose.
  • Fermentation produces byproducts like lactic acid, methane, hydrogen, and carbon dioxide.
  • These byproducts are a major cause of intestinal gas.
  • Intestinal gas can lead to flatulence, bloating, gastrointestinal pain, or diarrhea.

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