b) Suppose that your experiment from Part A above demonstrated that thyroxine is involved in body-temperature regulation. Now another claim has been made: that thyroxine is under negative feedback control. Design an experiment to test whether thyroxine’s effect on response to cold is under negative feedback control. Describe the overall investigation to be done, the variables to be tested, the variables to be kept constant, control and experimental conditions to be used, the type of data collected, and how the data will be collected. Explain how these data can be used to justify the conclusion that thyroxine is involved in adjusting body temperature in response to cold. (9 points)