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.
Cargo Ships. 1  Aldebaran-class stores ship. 2  Andromeda-class attack cargo ship. 3  Artemis-class attack cargo ship. 4  Arcturus-class attack cargo ship. 5  Crater-class cargo ship. 6  Liberty ship. 7  Tolland-class attack cargo ship. 8  Type C1-class cargo ship. 9  Type C2-class cargo ship. 10  Type C3-class cargo ship. 11  Type C4-class cargo ship. 12  Victory ship.