The intense acidification observed in the stomach lumen is energetically driven bya parietal cell isozyme of carbonic anhydrasean H+ ATPase the pumps H+ from the parietal cell into the lumenthe large gradient of Cl- ion in the plasma that allows movement of H+ into the lumenan OH- transporting ATPase that removes this ion from the lumen, causing a drop in pH

The acidic nature of gastric secretions have been observed in many animals including humans. The…

The intense acidification observed in the stomach lumen is energetically driven by O a parietal cell isozyme of carbonic anhydrase O an H+ ATPase the pumps H+ from the parietal cell into the lumen O the large gradient of Cl- ion in the plasma that allows movement of H+ into the lumen O an OH-transporting ATPase that removes this ion from the lumen, causing a drop in pH

The intense acidification observed in the stomach lumen is energetically driven by O a parietal cell isozyme of carbonic anhydrase O an H+ ATPase the pumps H+ from the parietal cell into the lumen O the large gradient of Cl- ion in the plasma that allows movement of H+ into the lumen O an OH-transporting ATPase that removes this ion from the lumen, causing a drop in pH

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter2: Life, Chemistry, And Water

Section: Chapter Questions

Problem 1ITD: The pH of human stomach acid ranges from 1.0 to 3.0, whereas a healthy esophagus has a pH of...

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The pH of human stomach acid ranges from 1.0 to 3.0, whereas a healthy esophagus has a pH of approximately 7.0. In gastroesophageal reflux disease (GERD), often called acid reflux, stomach acid flows backward from the stomach into the esophagus. Repeated episodes in which esophageal pH goes below 4.0, considered clinical acid reflux, can result in bleeding ulcers and damage to the esophageal lining. The data in the Figure, from a patient with GERD, show esophageal pH during a sleeping reflux event. How many minutes does it take to go from the peak of the reflux event (when pH is most acidic) to when the reflux event is over? Source: Based on T. Demeester et al. 1976. Patterns of gastroesophageal reflux in health and disease. Annals of Surgery 184:459469.
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