Describe the function and components of the mucosal barrier of the stomach. Protects the stomach from autodigestion Components Thick coating of bicarbonate-rich mucus Tight junctions of the epithelial cells Plasma membrane of gastric glands are impermeable to HCl.
World Range & Habitat. Sea lampreys, Petromyzon marinus, are found only in the Mediterranean and North Atlantic, in the coastal seas off the North East USA, Nova Scotia, southern Greenland, the UK, Ireland and Scandinavia. They are also found in the Great Lakes and enters inland freshwater rivers and streams to breed.
As adults in the marine environment, Pacific lampreys are parasitic and feed on a. variety of marine and anadromous fish including Pacific salmon, flatfish, rockfish, and pollock, and. are preyed upon by sharks, sea lions, and other marine animals. They have been caught in depths.