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Insulin

Definition

noun

A polypeptide hormone secreted by the beta cells of the islets of Langerhans of the pancreas to regulate the concentration of carbohydrates in blood by promoting metabolism of glucose


Supplement

Insulin is released when glucose concentration in blood is high (e.g. following an intake of carbohydrate-rich diet). Insulin regulates the concentration of glucose and other sugars circulating in blood by stimulating the uptake of glucose by cells in liver, skeletal muscles and fat tissues.

The lack of or inadequate insulin production results in diabetes mellitus. Thus, insulin has also been prepared pharmacologically for use in managing diabetes.


Word origin: Latin insula ( islet of the pancreas) + -in

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improved glucose tolerance in non obese type 2 diabetic rats

... An oral glucose tolerance test (OGTT) was performed 10 days before the operation and 10 days, 30 days and 45 days after the surgery. GLP-1 and insulin were measured during the OGTT 45 days after surgery. An insulin tolerance test (ITT) was performed 50 days after surgery. Glucose tolerance ...

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by rmorrison
Wed Mar 19, 2014 6:53 pm
 
Forum: Human Biology
Topic: improved glucose tolerance in non obese type 2 diabetic rats
Replies: 0
Views: 1569

Fasting and bloodsugar

After a meal, there is increase in the blood sugar level (glucose), which is regulated by Insulin secretion. But during fasting, when there is no food directly provided to the body to get it converted to glucose , blood sugar level rises slowly than normal.

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by vinu
Sat Mar 01, 2014 10:44 am
 
Forum: Human Biology
Topic: Fasting and bloodsugar
Replies: 3
Views: 1656

Fasting and bloodsugar

When you eat food your body is flooded with glucose, and so insulin is produced to keep the levels relatively constant. It will peak, however, after eating food, especially if that food is rich in sugars or carbohydrates. If you fast your body will produce ...

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by Babybel56
Fri Feb 28, 2014 9:34 am
 
Forum: Human Biology
Topic: Fasting and bloodsugar
Replies: 3
Views: 1656

When does gluconeogenesis kick in during physical activity?

... happens. What my coursebook teaches me is that glycogenolysis is the main purveyor of energy during physical exercise, and it is triggered by LOW INSULIN, HIGH GLUCAGON and HIGH ADRENALINE, which is exactly what happens when you start working out. So far so good. But then they tell me that gluconeogenesis ...

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by Aymeric
Fri Dec 13, 2013 10:35 am
 
Forum: Human Biology
Topic: When does gluconeogenesis kick in during physical activity?
Replies: 12
Views: 5587

Re: Fats in the Late Night?

... the notion that eating in the late hours of the day accentuates the storage of fatty tissue . After eating, the pancreas releases a hormone called insulin . Insulin then signals muscle and fat cells to absorb glucose from food. Sleep deprivation can affect the metabolic functions responsible for ...

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by Coelacanth
Sun Oct 13, 2013 5:50 am
 
Forum: Physiology
Topic: Fats in the Late Night?
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