5 Written questions
5 Matching questions
- Components of Digestive System
- Abdominal Cavity
- General Organization of the Digestive Tract
- a The last segment of the small intestine, about 12 feet long, and ends at the Ileocecal valve: controls the flow from the small intestine into the large intestine.
- b Oral cavity, teeth, tongue, esophagus, liver, gallbladder, large intestine, salivary glands, pharynx, stomach, pancreas, and small intestine. From the mouth to the anus.
- c Bordered by superiorly by the diaphragm, bordered inferiorly by the pelvic cavity, and lined by the peritoneum a serous membrane.
- d Occurs when materials enter digestive tract via the mouth.
- e Four major layers: from inside to outside: mucosa, submucosa, muscularis, and serosa.
5 Multiple choice questions
- Two thick layers of smooth muscles- inner and outer longitudinal, and involved in peristalsis, which is wave-like muscular contractions that move materials along digestive tract, and contains a nerve plexus.
- Secrete mucus for protection.
- The middle segment of the small intestine, about 8 feet one, and the site of most digestion and absorption.
- A hollow muscular tube, transports solid food and liquids to the stomach, and passes through the diaphragm muscle to get from the larynx to the abdomen.
- Simple columnar epithelium which invaginates to form gastric glands.
5 True/False questions
Mucosa → Deep to the mucosa, dense irregular connective tissue, and contains large blood vessels, large lymphatic vessels, and large nerves.
Parietal cells → Secrete HCl (hydrochloric acid)- gastric acid.
Villi → Fingerlike projections, which increase surface area.
G cells → Release the hormone Gastrin, which stimulates secretions by parietal and chief cells.
Functions of the Stomach → Storage of ingested food, sterilization of ingestive food, some digestion: mechanical breakdown of ingested food by churning; chemical breakdown of food material: by acids and enzymes, and some absorption of alcohol and aspirin.