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GLUCOSE Powered By Docstoc
					This is the tendency to maintain stability or
     uniformity in an organism’s internal
     environment. An internal balance is
   maintained of body temperature and of
   chemicals such as water , glucose , urea
       salts carbon dioxide homeostasis
  involves both the nervous and endocrine
The simple sugar that serves as the main source of
    energy in the body. Glucose is the principal
       sugar the body makes. The body makes
  glucose from proteins, fats and, in largest part,
   carbohydrates. Glucose is carried to each cell
      through the bloodstream. Cells, however,
  cannot use glucose without the help of insulin.
         Glucose is also known as dextrose.
In animals such as ourselves, the internal environment of our bodies must
       have certain conditions within a tolerance level to continue the
      healthy functioning of our body. This is done by a process called
      negative feedback control, where different receptors and effectors
       bring about a reaction to make sure that such conditions remain
                                 under control.
Negative Feedback Mechanisms:
Are the most common they are stimulus response mechanisms in
   which the response produced decreases the original stimulus.
   When the body sweats it cools the body down to its preferred
   temperature to 37 degrees.

Positive Feedback Mechanisms:
Are those which the stimulus causes the change that increases rather
   than decreases back to the original stimulus's. A positive feedback
   would be the action of a potential nerve cell.
Diabetes is a disorder of the metabolism, the way our bodies uses food for
      growth and energy. Most of the food we eat is broken down into
         glucose, and creates sugar in our blood. Glucose is the main
   component of fuel for the body. After digestion, glucose goes through
    the bloodstream, where it is used by cells for growth and energy. For
               glucose to get into cells, insulin must be provided.

 Insulin is a hormone made by the pancreas, it is a large gland behind the
     stomach. When we eat, the pancreas automatically makes the right
       amount of insulin to move glucose from blood into our cells. In
    people with diabetes the pancreas either makes little or no insulin, or
    the cells do not respond well to the insulin that is produced. Glucose
    builds up in the blood, overflows into the urine, and passes out of the
    body. Either way, the body loses its main source of fuel even though
                  the blood contains large amounts of sugar.
          Type 1:
  Diabetes is generally
genetic, which is known as
     type 1 diabetes.

           Type 2:
  This type of Diabetes can
usually be healed by healthy
      diet and fitness .




The body requires volumes of glucose in order to make
 ATP. Two hormones are responsible for controlling the
 concentration of glucose in the blood. These are insulin
   and glucagon. The diagram shows the principle of
      negative feedback control in action involving
                   blood/sugar levels.
   The receptors of the pancreas are in charge for
   controlling the glucose levels in the bloodstream.
  Two types of cells release two different hormones
    from the pancreas, insulin and glucagon. These
       hormones target the liver, one or the other
        depending on the glucose concentration.

When glucose levels increase, less glucagon and more
  insulin is released by the pancreas and targets the
  liver . In cases where glucose levels decrease, less
     insulin and more glucagon is released by the
              pancreas and targets the liver
  The liver acts as a storage place for glycogen, the
  storage form of glucose. When glycogen or insulin
   hormones aim for the liver, the following occurs;

Insulin - Insulin is released to the increase of glucose
      levels, therefore it converts the glucose into
   glycogen, which is stored in the liver to be used in
                        a later date.
Glucagon - Glucagon is released as a result of a
  decrease in glucose levels, and promotes the
  conversion of glycogen into glucose, where the
  lack glucose can be made up for by the new supply
  of glucose brought about from glycogen.
 The amount of glucose in your blood is carefully
controlled. Again, this uses the hormonal system. The
hormones responsible for regulating blood glucose are
 produced in the pancreas in particular areas called
                Islets of Langerhans.