4.1 PEx: Endocrine System Physiology part 2

Part A
Which rat(s) was euthyroid without any injections?
    the normal rat
    the thyroidectomized rat
    the normal rat and the hypophysectomized rat
    the hypophysectomized rat

Part B

An abnormally high level of which of the following will result in goiter?
    TRH
    either thyroxine or TRH
    either TRH or TSH
    thyroxine
    TSH

Part C

Why did the TSH have NO effect on the BMR of the thyroidectomized rat?
    The rat is missing its thyroid gland.
    The metabolism of the rat is already too high.
    The metabolism of the rat is already too low.
    The rat is missing its pituitary gland.

Part D
The injection of TSH resulted in goiter in _______.
The injection of TSH resulted in goiter in _______.
    the thyroidectomized rat
    the hypophysectomized rat
    the normal rat
    the normal rat and the hypophysectomized

Part E
Propylthiouracil injections resulted in goiter formation in _______.
    the hypophysectomized rat
    the normal rat
    the normal rat and the hypophysectomized rat
    the thyroidectomized rat