ATI RN
Pediatric Endocrine System Questions
Question 1 of 5
The thyroid hormones are transported in plasma bound to thyroxine-binding globulin (TBG), a glycoprotein synthesized in the liver. TBG binds approximately 70% of T4 and 50% of T3. TBG level increase with administration of
Correct Answer: A
Rationale: Estrogens (A) increase TBG levels, raising bound thyroid hormone.
Question 2 of 5
Chronic lymphocytic thyroiditis is the most common cause of acquired hypothyroidism, with or without goiter. All the following are true EXCEPT
Correct Answer: D
Rationale: The clinical course of chronic lymphocytic thyroiditis (Hashimoto’s) varies (not constant, D), with remission and progression possible.
Question 3 of 5
Hypocalcemia is common in neonates between 12 and 72 hr of life, especially in infants with
Correct Answer: D
Rationale: Hypomagnesemia (D) strongly correlates with neonatal hypocalcemia due to impaired PTH release.
Question 4 of 5
Parathyroid crisis is manifested by the following EXCEPT
Correct Answer: B
Rationale: Progressive polyuria (B) is not typical of hypercalcemic crisis; it’s more associated with diabetes insipidus.
Question 5 of 5
The MOST common cause of primary adrenal insufficiency in infancy is
Correct Answer: A
Rationale: Congenital adrenal hyperplasia (A), especially 21-hydroxylase deficiency, is the most common cause in infancy.