Vinnie Has High Blood Glucose and Must Take Insulin Shots

Vinnie has high blood glucose and must take insulin shots to control his blood sugar. Why must he override his normal homeostatic mechanisms by taking medication?

A) Vinnie's set point has changed telling him he needs more sugar.
B) Vinnie's sensors are detecting high levels of glucose and therefore are not secreting insulin due to positive feedback control.
C) Vinnie's negative feedback controls are not functioning properly.
D) An error signal has been sent to Vinnie's integrating center, which is not functioning properly.
E) Vinnie's positive feedback controls are not functioning properly.