Question: You are an expert in biology. 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: None