Unit 6 Case Study 1: Zachary’s Story
QA. An ulcer starts by eroding the mucosa of the GI tract wall. What functions of the digestion
and/or reabsorption might be lost if this layer is no longer functional? What functions will
be compromised if the ulcer eats through the submucosa and then the muscularis?
AA. The mucosa is the absorptive and secretory layer of the GI tract. The submucosa is the thick,
highly vascular, that serves the mucosa. Glands and nerve plexuses are found within this
layer where absorbed elements that pass through the mucosa are picked up from the blood
vessels of the submucosa. The muscularis is responsible for segmental contractions and
peristaltic movement in the GI tract (Torta, 2013). Ulcers are a defect of part of the gastric
or intestinal wall. Injury to gastric and duodenal mucosa caused by an ulcer develops when
gastric acid overwhelm the defensive properties of the mucosa. The stomach is the most acidic
part of the body. When a microbe ulcer causing bacteria enters, it thrives there because the
pH is low causing epithelial damage and a decrease in mucus secretion needed for normal
digestion. An ulcer may cause bleeding within the stomach, when blood is in the stomach it
cause the digestion process to turn back. No absorption takes place and the body losses
nutrients. The blood loss causes the depletion of iron and will cause anemia (Medicine, 2014).
QB. If Zach has a peptic ulcer affecting his stomach or duodenum, which components of the
peritoneum will be affected?
AB. Perforation may occur causing a hole through the wall of the stomach or duodenum
and bacteria and partially digested food would then spill through the opening into the
sterile abdominal cavity (peritoneum) and cause peritonitis, an inflammation of the