14.6 Blood Glucose Control (Cambridge (CIE) O Level Biology): Flashcards
Exam code: 5090
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Define insulin.
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Cards in this collection (12)
Define insulin.
A hormone from the pancreas, released when blood glucose rises, that lowers it by converting glucose into glycogen.
Define glucagon.
A hormone from the pancreas, released when blood glucose falls, that raises it by converting glycogen into glucose.
Which organ monitors and controls blood glucose concentration?
The pancreas.
What does insulin stimulate liver and muscle cells to do?
Convert excess glucose into glycogen for storage.
What does glucagon stimulate liver and muscle cells to do?
Convert stored glycogen into glucose, which is released into the blood.
What type of mechanism controls blood glucose concentration?
A negative feedback mechanism involving insulin and glucagon.
What causes type 1 diabetes?
The insulin-secreting cells in the pancreas cannot produce insulin, so blood glucose cannot be regulated.
How is type 1 diabetes treated?
By injecting insulin, which lowers blood glucose by converting it into glycogen.
When blood glucose rises, the pancreas releases , which lowers it again.
When blood glucose rises, the pancreas releases insulin, which lowers it again.
Two signs of type 1 diabetes are high blood glucose levels and glucose in the .
Two signs of type 1 diabetes are high blood glucose levels and glucose in the urine.
True or False?
Insulin and glucagon are both produced by the pancreas.
True.
The pancreas secretes insulin when blood glucose is high and glucagon when it is low.
True or False?
Glucagon lowers blood glucose by converting glucose into glycogen.
False.
Glucagon raises blood glucose by converting glycogen into glucose; it is insulin that lowers it.
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