Differentiate between vasopressin and insulin.

A patient is observed to have symptoms that are consistent with increased concentrations of epinephrine in the blood, including a rapid heart rate, anxiety, and elevated fatty acid concentrations. However, the circulating epinephrine concentrations are measured and found to be in the normal range. What might explain this?

A patient has an insulin sensitivity factor of 1 unit of insulin per 30 mg/dl over 110 mg/dl. If their blood glucose prior to a meal is 220 mg/dl, how much insulin do they need to inject? (round to the nearest unit)

Discuss the four mechanisms by which blood glucose homeostasis is maintained.