The effect of glucose upon the release of glucagon and insulin from the perfused rat pancreas in vitro was studied by varying both the concentration of glucose (from 3.3 to 4.6, 8.5, or 11.1 mmol/l) and the time of exposure to an elevated concentration of the sugar (5, 10 or 23 min). The results sug
The role of glucagon in the regulation of blood glucose: Model studies
✍ Scribed by Ruby Celeste; Eugene Ackerman; Laël C. Gatewood; Clayton Reynolds; George D. Molnar
- Publisher
- Springer
- Year
- 1978
- Tongue
- English
- Weight
- 867 KB
- Volume
- 40
- Category
- Article
- ISSN
- 1522-9602
No coin nor oath required. For personal study only.
✦ Synopsis
Mathematical models afford a procedure of unifying concepts and hypotheses by expressing quantitative relationships between observables. The model presented indicates the roles of both insulin and glucagon as regulators of blood glucose, albeit in different ranges of the blood glucose concentrations. Insulin secretion is induced during hyperglycemia, while glucagon secretion results during hypoglycemia. These are demonstrated by simulations of a mathematical model conformed to data from the oral glucose tolerance test and the insulin infusion test in normal control subjects and stable and unstable diabetic patients. The model studies suggest the parameters could prove of value in quantifying the diabetic condition by indicating the degree of instability.
I. Introduction.
The regulation of the glucose concentration in the blood of humans is one of the basic metabolic functions of the organism. Too low levels (hypoglycemia) may lead to emotional distress, mental confusion and
📜 SIMILAR VOLUMES
A simplified model of the blood-glucose regulatory system has been conformed to data from glucose-tolerance tests in nondiabetics measured by continuous sampling after oral ingestion and by intermittent determinations after different routes of administration. Despite the numerous approximations inhe
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