Microbiology 4000 Chapter 25
Digestive System Questions and
Answers.
Digestive System - Answer digestion and absorption of food; convert food to source of energy
+ raw materials for growth
Digestive tract - Answer hollow tube from mouth to anus
GI tract - Answer stomach and intestines
Accessory structures - Answer teeth, tongue, salivary glands, liver, pancreas; aid with
digestion, some produce enzymes
Upper Digestive System - Answer mouth, salivary glands, esophagus, stomach
Mouth/salivary glands - Answer physical/chemical digestion; IgA for immunity; lysozyme,
lactoferrin, poor saliva production-tooth decay
Esophagus - Answer connects mouth to stomach; peristalsis pushes food; mucus and saliva
containing secretory IgA bathes lining
Stomach - Answer elastic, muscular wall-breaks down food; highly acidic gastric juices
denature and digest proteins
Diseases of UDS - Answer dental caries, gingivitis, oral herpes, mumps, gastritis; H. pylori or
stomach flu by norovirus/rotavirus
Gastritis - Answer Bacterial UDI
1. Causative Agent-Helicobacter pylori; gram -; short, curved, many flagella
2. Signs and Symptoms
-Most are asymptomatic
-Leading cause of peptic and duodenal ulcer and gastric cancer
-Peptic ulcer-burning pain, nausea, vomiting, loss of appetite; advanced-bleeding, dizziness
(anemia), pain
-Gastric cancer-few symptoms at first (heartburn); lead to belly pain/swelling, loss of appetite,
weight loss
Digestive System Questions and
Answers.
Digestive System - Answer digestion and absorption of food; convert food to source of energy
+ raw materials for growth
Digestive tract - Answer hollow tube from mouth to anus
GI tract - Answer stomach and intestines
Accessory structures - Answer teeth, tongue, salivary glands, liver, pancreas; aid with
digestion, some produce enzymes
Upper Digestive System - Answer mouth, salivary glands, esophagus, stomach
Mouth/salivary glands - Answer physical/chemical digestion; IgA for immunity; lysozyme,
lactoferrin, poor saliva production-tooth decay
Esophagus - Answer connects mouth to stomach; peristalsis pushes food; mucus and saliva
containing secretory IgA bathes lining
Stomach - Answer elastic, muscular wall-breaks down food; highly acidic gastric juices
denature and digest proteins
Diseases of UDS - Answer dental caries, gingivitis, oral herpes, mumps, gastritis; H. pylori or
stomach flu by norovirus/rotavirus
Gastritis - Answer Bacterial UDI
1. Causative Agent-Helicobacter pylori; gram -; short, curved, many flagella
2. Signs and Symptoms
-Most are asymptomatic
-Leading cause of peptic and duodenal ulcer and gastric cancer
-Peptic ulcer-burning pain, nausea, vomiting, loss of appetite; advanced-bleeding, dizziness
(anemia), pain
-Gastric cancer-few symptoms at first (heartburn); lead to belly pain/swelling, loss of appetite,
weight loss
