digestive system - 18 Digestive System Answers and...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 18 Digestive System Answers and Explanations I. Introduction to the Digestive System A. Multiple Choice Questions 1. (a) – Deglutition, or swallowing, involves forming a bolus and then creating sufficient pressure within the oral cavity to force the food into the oropharynx. 2. (d) – Absorption is an essential aspect of digestion because ingested food is not technically within the body until it is absorbed. 3. (b) – The spleen is an organ of the circulatory/lymphatic system. B. True–False Questions 1. True – Much of the food ingested is never within the body and constitutes the bulk of the fecal material. 2. True – Digestion requires both chemical and physical action on the ingested food. 3. True – Molecules of food are absorbed through the mucosa of the small intestine to enter either capillaries of the circulatory system or vessels of the lymphatic system. 4. False – The GI tract begins at the oral cavity and ends at the anus. 5. False – Gut refers to the developing GI tract, and viscera is used with reference to any of the organs within the thoracic and abdominopelvic cavities. II. Serous Membranes and Tunics of the Gastrointestinal Tract A. Multiple Choice Questions 1. (b) – The parietal peritoneum lines the abdominal wall, and the visceral peritoneum covers abdominal viscera. The peritoneal cavity is the potential space between the two peritoneal membranes. 2. (d) – The small intestine and the large intestine are not individually compartmentalized. 3. (c) – With a few exceptions (modifications), the tunics of the GI tract are the same regardless of the region. 4. (e) – Distinct tissues compose each of the four tunics of the GI tract. B. True–False Questions 1. True – The peritoneum is a large continuous sheet of tissue that lines the abdominal cavity and covers abdominal visceral organs. 2. True – The mesentery is formed as two portions of the parietal peritoneum come together. The vessels and nerves that serve the viscera are sandwiched between the double-layered membrane. 3. False – The lamina propria is the supporting portion of the mucosa, just internal to the submucosa. 4. False – Parasympathetic stimulation of the GI tract through the vagus nerves increases peristalsis and intestinal secretion. III. Mouth, Pharynx, and Associated Structures A. Multiple Choice Questions 1. (e) – The fauces is the opening of the oral cavity into the oropharynx. 2. (c) – The lingual frenulum secures the tongue to the floor of the mouth. If it is too tight, however, movements of the tongue are restricted. 3. (e) – The roughened surface provided by the papillae aids in handling food and is an ideal surface for taste buds. 4. (d) – The epiglottis is a structure of the larynx, deep within the neck region.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/29/2011 for the course KINESIOLOG 245 taught by Professor Kk during the Spring '04 term at University of Calgary.

Page1 / 4

digestive system - 18 Digestive System Answers and...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online