TSH Levels in Blood Are Often Used by Doctors to Adjust

question 90

Multiple Choice

TSH levels in blood are often used by doctors to adjust doses of thyroid hormone replacement medications such as Synthroid. Why is TSH a good indicator of circulating thyroid hormone levels?

• A) because TSH is negatively regulated by thyroxine levels
• B) because TSH is positively regulated by thyroxine levels
• C) because TSH synthesis takes place in the cytoplasm of thyroid cells
• D) because TSH controls the production and secretion of TRH

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Definitions:

Uncollectible Accounts Receivable

Money owed to a business by its customers that is unlikely to be paid and often written off as a loss.