Question

Write a short note on thyroid gland. [3 MARKS]

Answer 1

Each point: 1 Mark

1. Thyroid is a butterfly-shaped gland located at the base of the neck.
2. It is regulated by TSH (thyroid stimulating hormone) secreted by the pituitary gland.
3. It secretes thyroxine hormone which requires iodine for its synthesis.
4. This hormone regulates growth and development by controlling rate of metabolism.
5. Iodine deficiency in the diet causes decreased thyroxine in the body causing goitre.