Keo's Notes

Control of Blood Glucose Concentration

1 min read

B5__Homeostasis-and-Response

Definition

It works in a negative feedback loop. When blood glucose levels change a hormone is secreted to oppose the change. The action of the hormone cannot occur continually as at a certain point the other hormone is released resulting in the other effect. This continues on a loop of the 2 hormones being produced.

  1. If glucose levels are too high:
    1. The pancreas secretes insulin.
    2. Insulin binds to cells in the target organs causing:
      1. Glucose to move from blood to muscles for respiration
      2. Excess glucose to be converted to glycogen.
  2. If glucose levels are too low:
    1. The pancreas secrets glucagon
    2. Glucagon binds to the livers cells causing glycogen to be broken down into glucose which is released into the blood.

Diabetes

Type 1

The pancreas can not produce enough insulin so blood glucose levels can rise to fatal amounts Is treated with insulin injections at meal times.

Type 2

Cells no longer respond to insulin Treated by certain drugs and diet change Obesity is a risk factor.

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