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Chris Chris
wrote...
Posts: 168
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11 years ago
If the thyroid is producing very low levels of T3 and T4, you would expect to see:
A. Absence of TSH
B. Normal levels of TSH
C. Lower than normal levels of TSH
D. Higher than normal levels of TSH
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Educator
8 years ago
The hypothalamus produces TSH Releasing Hormone (TRH) that signals the pituitary to tell the thyroid gland to produce more or less of T3 and T4 by either increasing or decreasing the release of a hormone called thyroid stimulating hormone (TSH).

- When T3 and T4 levels are low in the blood, the pituitary gland releases more TSH to tell the thyroid gland to produce more thyroid hormones.

- If T3 and T4 levels are high, the pituitary gland releases less TSH to the thyroid gland to slow production of these hormones.
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