A. Recreate the feedback loop diagram pictured here. Using the loop, illustrate how your body maintains blood glucose homeostasis using insulin, glucagon, the
pancreas, and the liver.

Ibelieve the answer is d. 

See diagram.we use washers to get the area and we will be integrating with respect to xouter radius is the  distance between y = e^x and y = -1    inner radius of washer is the distance between y = 1 and y = -1    the area of one cross-section of a washer is    solid lies between x = 0 and x = 2. the volume is    if you need this expanded, then    the question doesn't say to evaluate, so we're done.   

B) an efficient process