Exam 42: The Thyroid Gland

A 50-year-old woman complains that in the past few months she has had little energy,has frequently felt chilled,and has noticed excessive hair loss when she washes her hair.During the physical examination,her blood pressure registers at 105/85 mm Hg,her pulse is slow,and her physician notes dry,cool skin with puffiness of the face and arms.A preliminary diagnosis of primary hypothyroidism is made.If the diagnosis is correct,which of the following blood values would be expected?

A 50-year-old woman complains that in the past few months she has had little energy,has frequently felt chilled,and has noticed excessive hair loss when she washes her hair.During the physical examination,her blood pressure registers at 105/85 mm Hg,her pulse is slow,and her physician notes dry,cool skin with puffiness of the face and arms.A preliminary diagnosis of primary hypothyroidism is made.The primary reason for the elevated diastolic pressure is:

The thyroid hormone receptor is most like which of the following?

Secondary hyperthyroidism due to a pituitary tumor would be associated with the following histophysiological characteristics of the thyroid gland (in relation to normal):

Organification defect specifically concerns the inability of the thyroid to covalently bind iodide to tyrosine residues in the colloid.This reaction is performed by:

Which of the following proteins is found only at the basolateral side of thyroid epithelium?

Although pregnant women do not typically exhibit hyperthyroidism,maternal total T₄ levels increase during pregnancy.This benign increase in total T₄ is due to:

Graves' disease is due to an autoantibody that binds to and activates the TSH receptor.This interaction would primarily increase which second messenger in the thyroid epithelial cells?

A primary way by which T₃ increases oxygen consumption and causes heat to be generated (metabolic thermogenesis)in most cells in the body is through increasing the levels of:

Peripheral deiodinases can have which effect on T₄?