Regulating sugar in blood

By UK GCSE Biology · independent study · myAudience

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Regulating sugar in blood

Insulin from the pancreas influences glucose uptake in appropriate tissues and storage as glycogen, tending to reduce raised blood glucose. Insulin is a hormone; glycogen is a carbohydrate store. Higher-tier extension: glucagon-related liver responses increase glucose availability when blood glucose falls. A feedback explanation names the initial change and how the response opposes it.

Type 1 diabetes involves inadequate insulin production, commonly following immune damage to insulin-producing cells. Type 2 commonly includes reduced responsiveness and may also involve impaired secretion. These are distinct biological mechanisms, not explanations based on blame. A graph should state time and concentration units; monitoring, diagnosis and individual treatment require qualified healthcare assessment.

Worked example: After a meal, a modeled blood glucose concentration rises. Predict the insulin-related response.

Identify glucose as above the regulated range

Increased insulin action supports uptake and storage

Answer: Glucose concentration can move back toward its regulated range.

Check your understanding: Is insulin itself glycogen?

Answer: No.

Why: Insulin is a hormone; glycogen is a stored carbohydrate affected by hormonal regulation.