Overview. Boston Gear's spur gears, which are designed to transmit motion and power between parallel shafts, are the most economical gears in the power transmission industry.We offer both 14 1/2Â° and 20Â° PA (pressure angle), involute, and full-depth system gears. Transmits motion and power efficiently between parallel shafts. 2  Our 20Â° PA spur gear has a high load-carrying capacity for enhanced performance. 3  The 14 1/2Â° PA spur gear offers smooth, quiet operation. 4  Spur gears are manufactured in Delrin, non-metallic, brass, steel, and cast iron materials for maximum versatility.
ACTH is a segment of a much larger glycoprotein prohormone molecule called proopiomelanocortin (POMC). POMC is synthesized by the corticotrophs of the anterior pituitary, which constitute about 10 percent of the gland.
1 ACTH triggers the adrenal glands to release a hormone called cortisol, which regulates metabolism and blood pressure. 2  Thyroid-stimulating hormone (TSH) is a hormone that stimulates production and secretion of thyroid hormones from the thyroid gland (a gland in the hormone system).