GENERAL HISTOLOGY

Detailed explanation-1: -Thyroid hormone (TH) regulates metabolic processes essential for normal growth and development as well as regulating metabolism in the adult (28, 40, 189).

Detailed explanation-2: -Iodine (I) It is an essential constituent of the thyroid hormones (thyroxine (T4) and triiodothyronine (T3)), which play an essential role in gene transcription so as to regulate the basal metabolic rate as well as body growth and development.

Detailed explanation-3: -Thyroxine (T4) is produced by the thyroid gland under regulation from the hypothalamus and pituitary gland. The feedback loop signals to the hypothalamus in to release thyrotropin-releasing hormone, which then stimulates the pituitary gland to release the thyroid stimulating hormone.

Detailed explanation-4: -Thyroid hormones regulate growth by several mechanisms. In addition to their negative feedback effect on the stimulatory hormones thyrotropin-releasing hormone (TRH) and thyrotropin (TSH), thyroid hormones also regulate their receptors in various physiological and pathological conditions.

Detailed explanation-5: -Thyroxine is produced from the thyroid gland, which stimulates the metabolic rate. It controls the speed at which oxygen and food products react to release energy for the body to use. Thyroxine also plays an important role in growth and development.