Regulation of Insulin Levels
- Created by: Sam Brewer
- Created on: 04-04-13 21:38
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- Regulation of insulin levels
- Insulin is released by beta cells in the islets of Langerhans in the pancreas
- Insulin secretion needs to be stopped if blood glucose gets too low
- Insulin reduces the blood glucose concentration
- Regulation of insulin levels
- Insulin is released by beta cells in the islets of Langerhans in the pancreas
- Insulin secretion needs to be stopped if blood glucose gets too low
- Regulation of insulin levels
- Potassium ion channels are normally open allowing potassium ions to flow out
- Glucose moves into the cell when blood glucose concentration levels are high
- Glucose is metabolised to produce ATP
- Production of ATP closes the potassium ion channels in the cell membrane
- The inside of the cell becomes less negative because of the increase in potassium ions
- As the potential difference changes calcium ion channels in the membrane, which are normally shut, open
- Calcium ions allow vesicles of insulin to be released via the membrane by exocytosis
- As the potential difference changes calcium ion channels in the membrane, which are normally shut, open
- The inside of the cell becomes less negative because of the increase in potassium ions
- Production of ATP closes the potassium ion channels in the cell membrane
- Glucose is metabolised to produce ATP
- Glucose moves into the cell when blood glucose concentration levels are high
- Calcium ions allow vesicles of insulin to be released via the membrane by exocytosis
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