In which of the following conditions is it most likely that the TSH response to TRH will be reduced?
hypothyroidism due to tissue resistance to thyroid hormone
hypothyroidism due to disease destroying the thyroid gland
hyperthyroidism due to circulating antithyroid antibodies with TSH activity
hyperthyroidism due to diffuse hyperplasia of thyrotropes of the anterior pituitary
iodine deficiency
A young woman has puffy skin and a hoarse voice. Her plasma TSH concentration is low but increases markedly when she is given TRH. She probably has
hyperthyroidism due to a thyroid tumor
hypothyroidism due to a primary abnormality in the thyroid gland.
hypothyroidism due to a primary abnormality in the pituitary gland
hypothyroidism due to a primary abnormality in the hypothalamus
hyperthyroidism due to a primary abnormality in the hypothalamus
The metabolic rate is least affected by an increase in the plasma level of
TSH
TRH
TBG
Free T4
Free T3
Which of the following is not essential for normal biosynthesis of thyroid hormones?
iodine
ferritin
thyroglobulin
protein synthesis
Hypothyroidism due to disease of the thyroid gland is associated with increased plasma levels of
Cholesterol
Albumin
RT 3
Iodide
