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Question: Which of these statements about reflexes in the GI tract is false?
Choices:
Short reflexes are provoked by nerves near the GI tract.
Short reflexes are mediated by the enteric nervous system.
Food that distends the stomach initiates long reflexes.
Long reflexes can be provoked by stimuli originating outside the GI tract.
Question: Which of these ingredients in saliva is responsible for activating salivary amylase?
Choices:
mucus
phosphate ions
chloride ions
urea
Question: Which of these processes occurs throughout most of the alimentary canal?
Choices:
ingestion
propulsion
segmentation
absorption
Question: Which of these processes occurs in the mouth?
Choices:
ingestion
mechanical digestion
chemical digestion
all of the above
Question: Which of the following membranes covers the stomach?
Choices:
falciform ligament
mesocolon
parietal peritoneum
visceral peritoneum
Question: Which of the following organs is supported by a layer of adventitia rather than serosa?
Choices:
esophagus
stomach
small intestine
large intestine
Question: Which phase of deglutition involves contraction of the longitudinal muscle layer of the muscularis?
Choices:
voluntary phase
buccal phase
pharyngeal phase
esophageal phase
Question: Which of these organs is not considered an accessory digestive structure?
Choices:
mouth
salivary glands
pancreas
liver
Question: Which of the following stimuli activates sensors in the walls of digestive organs?
Choices:
breakdown products of digestion
distension
pH of chyme
all of the above
Question: Which of these statements about the pharynx is true?
Choices:
It extends from the nasal and oral cavities superiorly to the esophagus anteriorly.
The oropharynx is continuous superiorly with the nasopharynx.
The nasopharynx is involved in digestion.
The laryngopharynx is composed partially of cartilage.
Question: Which structure is located where the esophagus penetrates the diaphragm?
Choices:
esophageal hiatus
cardiac orifice
upper esophageal sphincter
lower esophageal sphincter