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Latest revision as of 02:38, 25 September 2026
Which statement regarding thyroid hormone is FALSE?
a) Maternal thyroid hormone does not cross the placenta.
b) Neonatal T3/T4 serum levels are proportional to gestational age and birth weight.
c) The sodium-iodide symporter is inhibited by high levels of iodide (I-), also known as the Wolf-Chaikoff effect.
d) Thyroid hormone is essential during the perinatal period for maturation of the CNS.
e) Cardiovascular effects of thyroid hormone include decreased systemic vascular resistance.
Click for Answer
Answer
Answer a. Maternal thyroid hormone does cross the placenta and is essential for fetal central nervous system development. The remainder of the answer options are correct.
Notes
- This question originally printed in the Pediatric Anesthesiology Review Topics kindle book series, and appears courtesy of Naerthwyn Press, LLC.