A blood test that gives the direct measurement of the amount of T? in the blood is
A) thyroid-stimulating hormone level
B) thyroxine level
C) radioactive iodine uptake
D) fasting blood sugar

Question

Quizplus · Accepted Answer

The direct measurement of the amount of T4 (thyroxine) in the blood can be obtained through a blood test. A high level of T4 could indicate hyperthyroidism, while a low level may suggest hypothyroidism. A thyroid-stimulating hormone (TSH) level test can indirectly provide information about T4 levels by measuring the level of hormone produced by the pituitary gland that stimulates the thyroid to produce T4. However, it is not a direct measurement of T4. Radioactive iodine uptake and fasting blood sugar tests are unrelated to thyroid function.

A Blood Test That Gives the Direct Measurement of the Amount