, NR 601 WEEK 5 QUIZ: THYROID
MANAGEMENT & DIABETES CARE |
QUESTIONS AND ANSWERS | 2026
UPDATE | 100% CORRECT.
SECTION 1: THYROID DISORDERS (Questions 1-
15)
Q1. Which of the following statements about thyroid hormones is
correct?
A) T3 is the most abundant circulating thyroid hormone
B) T4 is more biologically active than T3
C) T4 is a prohormone that is converted to T3 in peripheral tissues
D) Thyroid hormones are stored in the parathyroid glands
Correct Answer: C. T4 is a prohormone that is converted to T3 in
peripheral tissues
Rationale: The thyroid gland produces primarily T4 (thyroxine). T4 is
considered a prohormone that is converted to the more biologically active T3
(triiodothyronine) in peripheral tissues by deiodinase enzymes. T3 is about 3-
5 times more potent than T4 .
Q2. A 65-year-old patient presents with fatigue, weight gain, and
cold intolerance. Labs show TSH 8.5 mIU/L (normal 0.4-4.0) and free
T4 0.6 ng/dL (normal 0.8-1.8). What is the most likely diagnosis?
A) Subclinical hypothyroidism
B) Overt hypothyroidism
C) Euthyroid sick syndrome
D) Hyperthyroidism