A&P Chapter 23 Correctly Answered Questions, Questions and Answers with Explanations (latest Update), 100% Correct, Download to Score A

Where does the process of segmentation occur? A) anus B) small intestine C) stomach D) esophagus Answer (B) Small intestine How would you classify chewing food? A) ingestion B) digestion C) propulsion D) mechanical breakdown Answer (D) Mechanical breakdown The major means of propelling food through the digestive tract is A) swallowing B) churning C) peristalsis D) segmentation Answer (C) peristalsis The __________ is the serous membrane that lines the abdominal body wall. A) mesentery B) visceral peritoneum C) parietal peritoneum D) omenta Answer (C) parietal peritoneum Which layer of the alimentary canal is constructed from either stratified squamous or simple columnar epithelium? A) muscularis externa B) mucosa C) submucosa D) serosa Answer (B) mucosa Which layer of the alimentary canal is responsible for segmentation and peristalsis? A) Serosa B) muscularis externa C) mucosa D) submucosa Answer (B) muscularis externa The nervous system does not regulate digestive activity. A) True B) False Answer (B) False What muscle forms the labia of the mouth? A) buccinator B) zygomaticus C) orbicularis oculi D) orbicularis oris Answer (D) orbicularis oris What is the function of the soft palate? A) The soft palate rises reflexively to close off the nasopharynx when swallowing occurs. B) The soft palate provides a surface against which the tongue forces food during chewing. C) The soft palate secures the tongue to the floor of the mouth and limits its posterior movement. D) The soft palate cleanses the mouth. Answer (A) The soft palate rises reflexively to close off the nasopharynx when swallowing occurs. What is the opening to the mouth called? A) oral vestibule B) oral cavity C) oral orifice D) oral cavity proper Answer (C) oral orifice Which of the following is NOT a function of saliva? A) Saliva dissolves food chemicals so they can be tasted. B) Saliva contains enzymes that begin the chemical breakdown of proteins. C) Saliva moistens food and helps compact it into a bolus. D) Saliva cleanses the mouth. Answer (B) Saliva contains enzymes that begin the chemical breakdown of proteins. Which of the following inhibits salivation? A) sight or smell of food B) sympathetic division of the autonomic nervous system C) spicy foods D) parasympathetic division of the autonomic nervous system Answer (B) B) sympathetic division of the autonomic nervous system Which teeth are best suited for cutting or nipping off pieces of food in the permanent dentition? A) molars B) premolars (bicuspids) C) canines D) incisors Answer (D) incisors The __________ guards the entry of food into the stomach. A) ileocecal valve B) diaphragm C) pyloric sphincter D) cardiac sphincter Answer (D) Cardiac sphincter Which of the following is NOT a characteristic of the stomach? A) The stomach produces a double-layered coat of alkaline mucus. B) The stomach has three layers of muscle in the muscularis tunic. C) The stomach releases enzymes to digest carbohydrates. D) The stomach mucosa is folded into rugae. Answer (C) The stomach releases enzymes to digest carbohydrates. Which digestive process normally occurs only in the mouth? A) ingestion B) mechanical digestion C) absorption D) segmentation Answer (A) ingestion Which mesentery helps tether the stomach to the liver? A) pylorus B) lesser omentum C) greater omentum D) fundus Answer (B) lesser omentum The mucosa collapses inward when the stomach is empty, forming large folds known as __________. A) fundus B) pylorus C) cardia D) rugae Answer (D) rugae The __________ is the last segment of the small intestine. A) duodenum B) ileum C) jejunum D) colon Answer(B) ileum