Control, Coordination and Feedback. Blood glucose control. What is glucose? Why is glucose in the blood? Where does it come from? Where does it go? What is it there for? How much is there? How do you measure it? When does the concentration increase? When does the concentration decrease?.
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80 to 120 mg 100 cm-3 blood
This is the ‘normal’ range
The concentration fluctuates
Below 60 mg 100 cm-3 – coma
Above 180 mg 100 cm-3 exceeds renal threshold and glucose appears in the urine
What goes wrong when the concentration decreases?
What goes wrong when the concentration increases?
What goes wrong when the concentration decreases too far?
The symptoms associated with low blood sugar are:
tiredness, confusion, dizziness, headaches, mood swings, muscle weakness, shaking
What goes wrong when the concentration increases too far?
The symptoms include:
Excessive thirst; frequent urination;
fatigue; unexplained weight loss;
vision problems, such as blurring;
increased susceptibility to infections such as thrush.
A B C D
Biosensor Insulin mini-pump