Blood Glucose Control — GCSE Biology Revision
Revise Blood Glucose Control for GCSE Biology. Step-by-step explanation, worked examples, common mistakes and exam-style practice aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP.
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Go to Menstrual Cycle & FertilityWhat is Blood Glucose Control?
The concentration of glucose in the blood is carefully controlled by the hormones insulin and glucagon, which are produced by the pancreas. Insulin is released after a meal to lower blood glucose by causing cells to take it up and the liver to store it as glycogen. Glucagon is released when blood glucose is low, causing the liver to convert stored glycogen back into glucose.
Board notes: Covered by all major boards (AQA, Edexcel, OCR). The roles of insulin and glucagon in this negative feedback loop, and the differences between Type 1 and Type 2 diabetes, are key.
Step-by-step explanationWorked example
After eating a sugary snack, your blood glucose level rises. The pancreas detects this and releases insulin. Insulin travels to the liver and muscles, stimulating them to take up glucose from the blood and convert it into glycogen for storage. This brings the blood glucose level back down to normal.
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Common mistakes
- 1Confusing insulin and glucagon. Remember: Insulin gets glucose 'in' to the cells, lowering blood sugar. Glucagon is for when the glucose is 'gone', raising blood sugar.
- 2Mixing up glycogen and glucagon. Glycogen is the storage carbohydrate in the liver and muscles, while glucagon is the hormone that breaks it down.
- 3Confusing Type 1 and Type 2 diabetes. Type 1 is when the pancreas doesn't produce insulin, and it's treated with insulin injections. Type 2 is when the body's cells become resistant to insulin, and it's often linked to lifestyle factors.
Blood Glucose Control exam questions
Exam-style questions for Blood Glucose Control with mark-scheme style solutions and timing practice. Aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP specifications.
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Step-by-step method
Step-by-step explanation
4 steps · Worked method for Blood Glucose Control
Core concept
The concentration of glucose in the blood is carefully controlled by the hormones insulin and glucagon, which are produced by the pancreas. Insulin is released after a meal to lower blood glucose by c…
Frequently asked questions
What is diabetes?
Diabetes is a condition where the body cannot control its blood glucose levels. In Type 1, the pancreas produces little or no insulin. In Type 2, the body does not respond properly to insulin.
How is Type 1 diabetes treated?
Type 1 diabetes is treated with regular insulin injections throughout the day, combined with careful monitoring of blood glucose levels and a managed diet.