Gluconeogenesis Overview and Pathways
13 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 primary purpose of gluconeogenesis?

  • To create glucose from non-carbohydrate sources (correct)
  • To break down glycogen into glucose
  • To convert glucose into fatty acids
  • To store energy in the form of glycogen
  • Which of the following is NOT a gluconeogenic contributor?

  • Glycerol
  • Amino acids
  • Glucose (correct)
  • Lactic acid
  • Which hormone primarily promotes gluconeogenesis?

  • Cortisol (correct)
  • Insulin
  • Adrenaline
  • Somatostatin
  • What are modified keto acids primarily converted into during energy production?

    <p>Acetyl CoA</p> Signup and view all the answers

    Where does gluconeogenesis primarily occur in the body?

    <p>In the liver and kidneys</p> Signup and view all the answers

    Which enzyme converts pyruvate to oxaloacetate during gluconeogenesis?

    <p>Pyruvate carboxylase</p> Signup and view all the answers

    What is the primary location of gluconeogenesis?

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

    What role does glucose-6-phosphatase play in gluconeogenesis?

    <p>It removes a phosphate group from glucose-6-phosphate.</p> Signup and view all the answers

    Which source contributes to gluconeogenesis by breakdown of triglycerides?

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

    What is the purpose of gluconeogenesis?

    <p>To maintain blood glucose levels when they are low</p> Signup and view all the answers

    Which molecule is formed when glycerol is converted during gluconeogenesis?

    <p>Dihydroxyacetone phosphate</p> Signup and view all the answers

    Which of the following statements about amino acids in gluconeogenesis is accurate?

    <p>Amino acids react with keto acids to form new amino acids.</p> Signup and view all the answers

    How is lactic acid converted to glucose in the gluconeogenesis pathway?

    <p>Lactic acid is converted to pyruvate first.</p> Signup and view all the answers

    Study Notes

    Purpose of Gluconeogenesis

    • To maintain blood glucose levels during periods of fasting or starvation.
    • To provide glucose for the brain and red blood cells, which primarily rely on glucose for energy.

    Gluconeogenic Contributors

    • Not a contributor: Acetyl-CoA
    • Main Contributors: glycerol, lactate, amino acids

    Hormones and Gluconeogenesis

    • Primary hormone: Glucagon

    Modified Keto Acids

    • Converted into glucose during gluconeogenesis.

    Location of Gluconeogenesis

    • Occurs primarily in the liver.

    Enzyme Conversion

    • Pyruvate carboxylase converts pyruvate to oxaloacetate during gluconeogenesis.

    Glucose-6-Phosphatase Role

    • Degrades glucose-6-phosphate to glucose for release into the bloodstream.

    Triglyceride Breakdown

    • Glycerol, a product of triglyceride breakdown, contributes to gluconeogenesis.

    Glycerol Conversion

    • Glycerol is converted to dihydroxyacetone phosphate during gluconeogenesis.

    Amino Acids in Gluconeogenesis

    • Many amino acids can be converted into glucose, contributing to gluconeogenesis.

    Lactic Acid Conversion

    • Lactic acid is converted to pyruvate, which then enters the gluconeogenesis pathway.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    This quiz covers the essential processes of gluconeogenesis, including its definition, sources, location, and importance in maintaining blood glucose levels. It also explores the gluconeogenesis pathway, detailing the conversion of pyruvate to oxaloacetate and the role of specialized enzymes.

    More Like This

    Use Quizgecko on...
    Browser
    Browser