Chapter 23 Review Questions Flashcards
Which of these organs is not considered an accessory digestive structure?
A. Mouth
B. Salivary glands
C. Pancreas
D. Liver
A. Mouth
Which of the following organs supported by a layer of adventitia rather than serosa?
A. Esophagus
B. Stomach
C. Small intestine
D. Large intestine
A. Esophagus
Which of the following membranes covers the stomach?
A. Falciform ligament
B. Mesocolon
C. Parietal peritoneum
D. Visceral peritoneum
D. Visceral peritoneum
Which of these processes occurs in the mouth?
A. Ingestion
B. Mechanical digestion
C. Chemical digestion
D. All of the above
D. All of the above
Which of the following stimuli activates sensors in the walls of digestive organs ?
A. Breakdown products of digestion
B. Distension
C. pH of chyme
D. All of the above
D. All of the above
Which of these processes occurs throughout most of the alimentary canal?
A. Ingestion
B. Propulsion
C. Segmentation
D. Absorption
B. Propulsion
Which of these statements about reflexes in the GI tract is false?
A. Short reflexes are provoked by nerves near the GI tract.
B. Short reflexes are mediated by the enteric nervous system.
C. Food that distends the stomach initiates long reflexes.
D. Long reflexes can be provoked by stimuli originating outside the GI tract.
C. Food that distends the stomach initiates long reflexes.
Which of these ingredients in saliva is responsible for activating salivary amylase?
A. Mucus
B. Phosphate ions
C. Chloride ions
D. urea
C. Chloride ions
Which of these statements about the pharynx is true?
A. It extends from the nasal and oral cavities superiorly to the esophagus anteriorly
B. The oropharynx is continuous superiorly with the nasopharynx
C. The nasopharynx is involved in digestion
D. The laryngopharynx is composed partially of cartilage
B. The oropharynx is continuous superiorly with the nasopharynx
Which structure is located where the esophagus penetrate the diaphragm?
A. Esophageal hiatus
B. Cardiac orifice
C. Upper esophageal sphincter
D. Lower esophageal sphincter
A. Esophageal hiatus
Which phase of deglutition involves contraction of the longitudinal muscle layer of the muscularis?
A. Voluntary phase
B. Buccal phase
C. Pharyngeal phase
D. Esophageal phase
D. Esophageal phase
Which of these cells secrete hormones?
A. Parietal cells
B. Mucous neck cells
C. Enteroendocrine cells
D. Chief cells
C. Enteroendocrine cells
Where does the majority of chemical digestion in the stomach occur?
A. Fundus and body
B. Cardia and fundus
C. Body and pylorus
D. Body
A. Fundus and body
During gastric emptying, chyme is released into the duodenum through the______.
A. Esophageal hiatus
B. Pyloric antrum
C. Pyloric canal
D. Pyloric sphincter
D. Pyloric sphincter
Parietal cells secrete______.
A. Gastrin
B. Hydrochloric acid
C. Pepsin
D. Pepsinogen
B. Hydrochloric acid