Regulating Blood Glucose Concentrations

Explain how the hormones insulin and glucagon act to regulate blood glucose concentrations

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  • Created by: chunks-42
  • Created on: 10-05-15 11:02
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Key Words
Glucose - molecule for respiration
Glycogen - stored glucose in the liver
Liver - organ
Brain - organ
Pancreas - organ
Insulin - hormone
Glucagon - hormone
Islets of Langerhans - Site of hormone production in pancreas (alpha and beta cells)
Alpha and Beta cells - within the pancreas
What are hormones?
They are chemical substances that help to regulate processes in the body.
Hormones are secreted by glands and travel to their target organs in the bloodstream.
Insulin is a hormone produced by the pancreas that reduces the blood glucose level, ensuring that
it remains within narrow limits

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Which of these parts of the body are involved in the negative feedback process that regulates blood
glucose? The brain, the pancreas and the liver are all involved in regulating blood glucose.
The brain detects the level of glucose in the blood. When the level of blood glucose increases above
normal, what hormone does the pancreas release?
The pancreas is stimulated to release insulin.…read more

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Negative feedback also occurs when the blood glucose level decreases below normal. This time the
brain detects decreased blood glucose and so the pancreas is stimulated to release which hormone?
The pancreas produces the hormone glucagon. Glucagon stimulates the liver to convert glycogen back
to glucose and release this glucose back into the bloodstream.
The level of glucose in the blood increases, causing the pancreas to stop producing insulin.…read more

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