The roles of the pituitary gland and hypothalamus, which control thyroid hormone levels via secretion of TSH and TRH, respectively, have been discussed elsewhere. A fourth class of hypothyroidism is congenital...implying a defect at birth that affects thyroid hormone synthesis, transport to tissues or iodine metabolism.
exists and is an alternate of . It depends on which snakes your referring to, cobras, pythons, boa constrictors, rattlesnakes, and vipers all move at a rate of 3-7 mph. But the Black Mamba can move at 20 kmph or 8 mph, which in the snake world is super fast.
Baby rattlesnakes usually do not feed prior to their first winter and may hibernate in adult dens. Average growth for juvenile rattlesnakes is about 10-16 cm per year. Adult growth is about 3 cm per year. Captive western rattlesnakes can live up to 30 years, but the lifespan of wild snakes is thought to be much lower.