By the end of the Cretaceous period, the continents were separating into land masses that look like our modern-day continents. An Austrian geologist stated that there had been once a land bridge connecting South America, Africa, India, Australia, and Antarctica. He named this land mass Gondwanaland. For how Pangea looked, it is better shown through a picture, than through words. So, what is happening now with the continents. As we speak, the continents are moving, they are always moving, how they move so slowly that you cant tell. Some of the continents move merely 1.5 inches a year, while the others move with lightning speed of 2.5 inches per year. It's about as fast as your fingernails grow.
Society for Endocrinology. Hormones. Triiodothyronine is a thyroid hormone that plays vital roles in the bodyâs metabolic rate, heart and digestive functions, muscle control, brain development and the maintenance of bones.
TSH causes the thyroid gland to make two hormones: triiodothyronine (T3) and thyroxine (T4). T3 and T4 help control your body's metabolism. Triiodothyronine (T3) and thyroxine (T4) are needed for normal growth of the brain, especially during the first 3 years of life.A baby whose thyroid gland does not make enough thyroid hormone (congenital hypothyroidism) may, in severe cases, be mentally retarded.uide. A thyroid-stimulating hormone (TSH) blood test is used to check for thyroid gland problems. TSH is produced when the hypothalamus releases a substance called thyrotropin-releasing hormone (TRH). TRH then triggers the pituitary gland to release TSH.