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.
Rattlesnakes attack their prey by striking. They strike to inject toxic venom into the blood stream. A three foot snake can strike about 12 inches or about one-third of its body size. The fangs of a massasauga are hollow and the venom is secreted into them by glands.Rattlesnakes can control the injection of venom and sometimes don't use it when they bite because of self defense, possibly saving it only for prey.rop for drop, the massasaugas venom is more toxic than the timber rattler, but because of the smaller volume of venom, a bite would probably not cause severe harm to an adult human. Very few large domestic animals have ever been killed by rattlesnake bites and hogs are usually unharmed because of their layers of fat.