Pepsinogen I is secreted by chief cells, and pepsinogen II is secreted by pyloric glands. The secretion of pepsinogen is stimulated by vagal stimulation, gastrin, and histamine. Pepsinogen I is mainly found in the body of the stomach, where most acid is secreted. Pepsin is a proteolytic enzyme, whereas pepsinogen is a proenzyme. â¢ Pepsin is the active form of pepsinogen while pepsinogen is the inactive precursor of pepsin. â¢ Unlike the pepsin, pepsinogen is secreted by chief cells and pyloric glands.
A reefer ship is a refrigerated cargo ship; a type of ship typically used to transport perishable commodities which require temperature-controlled transportation, such as fruit, meat, fish, vegetables, dairy products and other foods.
These ships provide the U.S. Navy with a fast, reliable platform that can respond to emergent requirements in a shallow water environment. The lead ship of the class, Cyclone (PC 1), was decommissioned and turned over to the U.S. Coast Guard 28 February 2000.ephyr Chief Boatswain s Mate Greg Isbell said he turned down orders to be the executive officer of an aids-to-navigation cutter when he learned that the coastal patrol ships were being turned over to the Coast Guard.