The Endocrine Glands · NCERT Biology

Which element is essential for the normal rate of hormone synthesis in the thyroid?

  1. Iron
  2. Calcium
  3. Iodine
  4. Sodium
Show answer and explanation

Correct answer: Iodine

Iodine is a critical component of thyroid hormones like $T_3$ and $T_4$. A deficiency in dietary iodine leads to hypothyroidism and the enlargement of the thyroid gland, commonly known as goitre.

Difficulty: Medium Question 6 of 20

Practice all 20 The Endocrine Glands questions

Keep practicing

More The Endocrine Glands questions