Textbook Question
Outline the conditions that direct pyruvate toward the following:
c. Conversion to lactate
In what tissues or organisms is each pathway present?
Ch.22 Carbohydrate Metabolism
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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Table of contents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Not the one you use?Change textbook
Chapter 22, Problem 23d
Glucose 6-phosphate is in a pivotal position in metabolism. Depending on conditions, glucose 6-phosphate follows one of several pathways. Under what conditions do the following occur?
d. Glycogenesis
Verified step by step guidance1
Understand the term 'Glycogenesis': Glycogenesis is the process of synthesizing glycogen from glucose molecules. It occurs primarily in the liver and muscle cells and serves as a way to store glucose for later use.
Identify the role of glucose 6-phosphate: Glucose 6-phosphate is an intermediate in carbohydrate metabolism. It can be converted into glucose 1-phosphate, which is a precursor for glycogen synthesis during glycogenesis.
Determine the conditions for glycogenesis: Glycogenesis occurs when there is an excess of glucose in the bloodstream, such as after a meal. This is because the body needs to store the surplus glucose as glycogen for future energy needs.
Explain the hormonal regulation: Glycogenesis is stimulated by the hormone insulin, which is released by the pancreas in response to high blood glucose levels. Insulin activates enzymes like glycogen synthase, which catalyzes the formation of glycogen from glucose.
Summarize the metabolic context: Glycogenesis is favored in anabolic (energy-storing) conditions, such as during the fed state, when the body has sufficient energy and glucose availability to store as glycogen.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Glycogenesis
Glycogenesis is the biochemical process of converting glucose into glycogen for storage, primarily in the liver and muscle tissues. This process occurs when there is an excess of glucose in the bloodstream, typically after meals, and is stimulated by insulin. Glycogenesis helps maintain blood sugar levels and provides a readily available energy source during periods of fasting or increased energy demand.
Insulin Regulation
Insulin is a hormone produced by the pancreas that plays a crucial role in regulating glucose levels in the blood. After eating, insulin is released in response to rising blood glucose levels, promoting the uptake of glucose by cells and stimulating glycogenesis. Understanding insulin's role is essential for comprehending how glucose 6-phosphate is directed towards glycogen synthesis under specific metabolic conditions.
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Metabolic Pathways
Metabolic pathways are series of chemical reactions occurring within a cell that lead to the conversion of substrates into products. Glucose 6-phosphate can enter various pathways, including glycolysis, gluconeogenesis, and glycogenesis, depending on the cell's energy needs and hormonal signals. The regulation of these pathways is vital for maintaining energy homeostasis and responding to physiological changes.
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Related Practice
Textbook Question
Outline the conditions that direct pyruvate toward the following:
b. Conversion to ethanol and CO2
In what tissues or organisms is each pathway present?
Textbook Question
What is the purpose of the Cori cycle?
Textbook Question
What two types of reactions convert glycerol to dihydroxyacetone phosphate?
Textbook Question
Glucose 6-phosphate is in a pivotal position in metabolism. Depending on conditions, glucose 6-phosphate follows one of several pathways. Under what conditions do the following occur?
b. Hydrolysis to free glucose
Textbook Question
Outline the conditions that direct pyruvate toward the following:
d. Glucose synthesis (gluconeogenesis)
In what tissues or organisms is each pathway present?