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.
Answer notochord pharyngeal gill pouches nerve cord none of the above. 1 points Question 48 Lancelets inhabit the Answer surface of freshwater ponds. bottom of lakes. depths of the ocean. shallow sandy coastal areas. . 1 points Question 49 The skull encases the ______ in a vertebrate.Answer nerve cord brain endocrine system none of the above. 1 points Question 50 The lamprey is a ______ fish still living today. Answer jawless bony cartilaginous none of the above. 1 points Question 51 Almost all ______ must lay eggs in the water.nswer notochord pharyngeal gill pouches nerve cord none of the above. 1 points Question 48 Lancelets inhabit the Answer surface of freshwater ponds. bottom of lakes. depths of the ocean. shallow sandy coastal areas. . 1 points Question 49 The skull encases the ______ in a vertebrate.