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Glucose Homeostasis: Regulation of Blood Glucose01:02

Glucose Homeostasis: Regulation of Blood Glucose

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Carbohydrates consumed through foods are converted into glucose, a crucial energy source for the body. In the prandial state, high blood glucose levels stimulate the secretion of insulin from the pancreas. Insulin inhibits hepatic glucose production and stimulates glucose uptake and metabolism by muscle and adipose tissue. The excess glucose is converted into glycogen and stored in the liver and muscles.
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Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
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What is Glycolysis?00:56

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Cells make energy by breaking down macromolecules. Cellular respiration is the biochemical process that converts "food energy" (from the chemical bonds of macromolecules) into chemical energy in the form of adenosine triphosphate (ATP). The first step of this tightly regulated and intricate process is glycolysis. The word glycolysis originates from the Latin glyco (sugar) and lysis (breakdown). Glycolysis serves two main intracellular functions: generating ATP and generating...
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Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
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Complex carbohydrates consumed cannot be absorbed into the small intestine in their original form. First, they must be hydrolyzed to a monosaccharide form such as glucose or galactose. These monosaccharides are then transported across the intestinal membrane and into the blood via transcellular transport. The intestinal epithelial cells allow the movement of these monosaccharides with a defined 'entry' through membrane transporter proteins present on their apical membrane and...
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Carbohydrate metabolism is a fundamental biochemical process that ensures a constant supply of energy to living cells. The most important carbohydrate is glucose, which can be broken down via glycolysis to enter into the Krebs cycle and eventually lead to the production of ATP through oxidative phosphorylation.
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Glucose: Detection and analysis.

A L Galant1, R C Kaufman1, J D Wilson1

  • 1USDA-ARS, Grain Marketing and Production Research Center, Manhattan, KS 66502, United States.

Food Chemistry
|June 5, 2015
PubMed
Summary

This review covers key methods for detecting and quantifying glucose, a vital sugar in biology and food. It evaluates techniques like copper iodometry, HPLC, GC, CZE, and enzyme-based systems for food chemistry applications.

Keywords:
DetectionGlucoseGlucose metersIodometryQuantification

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Area of Science:

  • Biochemistry and Food Chemistry

Background:

  • Glucose is a fundamental monosaccharide vital for energy in organisms.
  • It plays a crucial role in food products, influencing flavor and texture.
  • Accurate glucose measurement is essential in various scientific fields.

Purpose of the Study:

  • To review established and significant methods for glucose detection and quantification.
  • To evaluate the strengths and weaknesses of different analytical techniques.
  • To discuss the application of these methods in food chemistry.

Main Methods:

  • Copper iodometry
  • High-Performance Liquid Chromatography (HPLC)
  • Gas Chromatography (GC)
  • Capillary Zone Electrophoresis (CZE)
  • Enzyme-based systems (e.g., glucose meters)

Main Results:

  • Each method presents unique advantages and limitations for glucose analysis.
  • Enzyme-based systems offer convenience, while chromatographic and electrophoretic methods provide high resolution.
  • Historical methods like copper iodometry remain relevant for specific applications.

Conclusions:

  • A range of analytical techniques exist for glucose determination, each suited to different needs.
  • Understanding method limitations is crucial for accurate food chemistry analysis.
  • Continued application and refinement of these methods are vital for food science research.