Question

Choose the incorrect statement with respect to the hormone melatonin.

Answer 1

The hormone melatonin is synthesized by the pineal gland. It is responsible for regulating the 24-hour (diurnal) rhythm of our body, including the normal rhythms of the sleep-wake cycle. It also plays an important role in metabolism, pigmentation, menstrual cycle, and the defence capability of our body.

Iodine is essential for the synthesis of thyroxine in the thyroid gland. It has no effect on the synthesis of melatonin hormone.