Which of the following most accurately represents the pathophysiological sequence of untreated type I diabetes?

A) Oversecretion of insulin results in hypoglycemia; cells convert to the use of fats for energy resulting in the production of ketone bodies.
B) Glucose is not absorbed through the gastrointestinal tract, resulting in hyposecretion of insulin and hypoglycemia. Lack of glucose results in anaerobic metabolism and acidosis.
C) Hyposecretion of insulin prevents glucose from being broken down in the gastrointestinal tract; too much glucose is absorbed from the gastrointestinal tract resulting in hyperglycemia and ketoacidosis.
D) Hyposecretion of insulin results in inability of glucose to enter cells; blood glucose levels rise, and cells convert to the use of fats for energy, resulting in the production of ketone bodies.

Answer: D