Question: Blood glucose level is regulated by two antagonistic hormones, glucagon and insulin. The following graph shows the fluctuations in an individual's blood glucose level over a five hour period. From the information provided above and your knowledge of physiology, which of the following statements are appropriate? I. Normal homeostatic mechanisms maintain a glucose concentration of approximately 1 mg/ml. II. Glucagon is released at points A and C. III. The individual eats a meal at point D. IV. Insulin is being released at points B and E.
Answer: I and IV only