1.
A) The effects thyroxine secretion on the body are increasedmetabolic rate and heat production. Are these two responses relatedor are they independent of one another? Explain your answer.
B) When thyroxine levels in the blood are low, the level willreturn to normal due to negative feedback. Describe the events inthe negative feedback loop that returns thyroxine to normal levels.Include names of the organs and hormones involved.
C) Compare the BMR of a normal rat, a thyroidectomized rat, anda hypophysectomized rat (highest to lowest) before and after aninjection of an equal amount of TSH.  What accounts forthe differences or similarities?
