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Biology A level

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Question:

How does insulin regulate blood glucose levels

Author: Gen Bailey



Answer:

Blood glucose levels INCREASE after food is eaten (food digested and glucose absorbed in ileum) The pancreas detects the INCREASE in blood glucose. The beta cells of the pancreas release INSULIN Insulin is released into the blood and moves to the liver. Insulin binds to the specific insulin receptor proteins in the liver cell membrane. This Causes an increase in glucose channel proteins in the liver cells membrane so more glucose moves from blood into the liver cells by FD Enzymes are activated enzymes join glucose molecules together to form glycogen (glycogenesis ) excess glucose molecules are converted to fat these negative feedback mechanisms decrease blood glucose levels back to normal


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