5 Written questions
5 Matching questions
- Submucosal Nerve Plexus
- Functions of the Digestive System
- The Impressive Lining of the Digest Tract
- Mucous cells
- Regions of the Small Intestine
- a Secrete mucus for protection.
- b The epithelial lining is continuous, at the mouth and at the anus, with the external environment, it must accommodate these transitions at either end while remaining moist, it must also be very thin to accomplish both digestion and absorption, and it must handle the rapid turnover of its epithelial cells due to mechanical and chemical insults while protecting the deeper tissues against: chemical stresses corrosive effects of digestive acids and enzymes), mechanical stresses, such as abrasion, and pathogenic bacteria.
- c Duodenum, Jejunum, and Ileum.
- d Contains sensory neurons that sense chemical changes in the lumen, and motor neurons (sympathetic and parasympathetic) that innervate the muscularis mucosae.
- e Ingestion, Mechanical processing, secretion, digestion, absorption, and excretion.
5 Multiple choice questions
- Fingerlike projections, which increase surface area.
- Deep to the lamina propria, a thin layer of smooth muscle cells, and muscle contraction causes movement of the mucosa.
- The first segment of the small intestine, begins at the pyloric sphincter: which controls flow from the stomach to here, about 1 foot long, and it receives: chyme from the stomach and digestive enzymes and buffers from pancreas and liver.
- The chemical breakdown of food into smaller fragments.
- Four major layers: from inside to outside: mucosa, submucosa, muscularis, and serosa.
5 True/False questions
Ileum → 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.
Absorption → Removal of waste products (feces) from body.
Submucosa → Deep to the mucosa, dense irregular connective tissue, and contains large blood vessels, large lymphatic vessels, and large nerves.
Jejunum → The middle segment of the small intestine, about 8 feet one, and the site of most digestion and absorption.
G cells → Release the hormone Gastrin, which stimulates secretions by parietal and chief cells.