Chapter 26 Practice Questions

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Which of the following is NOT one of the six organs that make up the gastrointestinal (GI) tract?

Liver (correct)

Esophagus

Small intestine

Stomach

Which of the following is an accessory organ involved in the digestive process?

Pancreas (correct)

Small intestine

Stomach

Large intestine

What are the four tunics (layers) that make up the gastrointestinal wall?

Mucosa, submucosa, muscularis externa, serosa (correct)

Mucosa, muscularis interna, serosa, adventitia

Mucosa, muscularis externa, serosa, adventitia

Mucosa, submucosa, muscularis interna, serosa

Which layer of the gastrointestinal tract is responsible for absorption and secretion?

Mucosa Signup and view all the answers

What is the main function of the enteric nervous system (ENS)?

Coordinates mixing and propulsion reflexes Signup and view all the answers

Which tunic of the gastrointestinal tract wall contains blood vessels, lymph vessels, and nerves?

Submucosa Signup and view all the answers

What is the main function of the muscularis layer of the gastrointestinal tract?

Controls contractions Signup and view all the answers

Which of the following is NOT a function of saliva?

Dissolving food molecules to stimulate taste receptors Signup and view all the answers

Which salivary gland produces the largest amount of saliva?

Parotid gland Signup and view all the answers

What type of cells secrete mucin in the salivary glands?

Mucous cells Signup and view all the answers

How are salivary secretions regulated?

By the brainstem Signup and view all the answers

Which of the following is true about mastication?

It mechanically reduces bulk to facilitate swallowing Signup and view all the answers

What is the hardest substance in the body?

Calcium phosphate crystals Signup and view all the answers

When do permanent teeth usually appear?

During late teens or 20s Signup and view all the answers

What is the function of the superior esophageal sphincter?

To initiate the swallowing reflex Signup and view all the answers

Which of the following is NOT a function of the stomach?

Absorption of nonpolar substances Signup and view all the answers

Which cells in the stomach produce and secrete packets of pepsinogen?

Chief cells Signup and view all the answers

What is the function of intrinsic factor in the stomach?

Required for absorption of vitamin B12 in the ileum Signup and view all the answers

Which cells in the stomach secrete the hormone gastrin?

G-cells Signup and view all the answers

Which layer of the peritoneum covers the internal organs' surface?

Visceral peritoneum Signup and view all the answers

What is the primary cause of peritonitis?

GI tract perforation Signup and view all the answers

What is the difference between a short reflex and a long reflex?

Short reflex involves the ENS only, while long reflex involves the CNS and autonomic motor output Signup and view all the answers

Which hormones participate in the regulation of digestion?

Gastrin, secretin, cholecystokinin, motilin Signup and view all the answers

Which of the following is a primary function of stomach motility?

Mixing the bolus to form chyme Signup and view all the answers

What happens during gastric mixing in the stomach?

The size of swallowed particles is reduced Signup and view all the answers

What is the main force that moves chyme from the stomach into the duodenum?

Pressure gradient Signup and view all the answers

What regulates the digestive processes in the stomach?

Nervous reflexes and hormones Signup and view all the answers

Which of the following is NOT one of the six organs that make up the gastrointestinal (GI) tract?

Liver Signup and view all the answers

What is the primary cause of peritonitis?

Inflammation of the peritoneum Signup and view all the answers

Which of the following is NOT a function of saliva?

Neutralizing stomach acid Signup and view all the answers

Which layer of the gastrointestinal tract is responsible for absorption and secretion?

Mucosa Signup and view all the answers

What is the main function of the muscularis layer of the gastrointestinal tract?

Motility Signup and view all the answers

What regulates the digestive processes in the stomach?

Enteric nervous system Signup and view all the answers

What is the function of the superior esophageal sphincter?

To prevent reflux of stomach contents into the esophagus Signup and view all the answers

Which of the following is NOT a function of the oral cavity?

Separating oral cavity from nasal cavity Signup and view all the answers

Which salivary gland produces the smallest amount of saliva?

Intrinsic salivary gland Signup and view all the answers

What is the function of the uvula in the oral cavity?

Closing off the posterior entrance into the nasopharynx Signup and view all the answers

What is the primary function of salivary amylase in the oral cavity?

Initiating chemical breakdown of starch Signup and view all the answers

Which layer of the gastrointestinal tract is lined with nonkeratinized stratified squamous epithelium?

Mucosa Signup and view all the answers

What is the function of the inferior esophageal sphincter?

To prevent stomach contents from regurgitating Signup and view all the answers

What is the primary cause of dental caries?

Bacterial production of acids Signup and view all the answers

What is the main force that moves the bolus from the oropharynx to the esophagus during swallowing?

Elevation of soft palate and uvula Signup and view all the answers

Which of the following is NOT a function of the stomach?

Absorption of nutrients Signup and view all the answers

What is the main function of the gastric pit and gland in the stomach?

To produce and secrete gastric juice Signup and view all the answers

Which cells in the stomach produce hydrochloric acid?

Parietal cells Signup and view all the answers

What is the function of chief cells in the stomach?

To produce and secrete packets of pepsinogen Signup and view all the answers

Which of the following is NOT a function of stomach motility?

Breaking down proteins into amino acids Signup and view all the answers

What is the main force that moves chyme from the stomach into the duodenum?

Gastric emptying Signup and view all the answers

What is the function of the superior esophageal sphincter?

To prevent the backflow of stomach contents into the esophagus Signup and view all the answers

What is the primary cause of peritonitis?

Perforation of the stomach or duodenum Signup and view all the answers

Which of the following is true about the peritoneum?

It secretes lubricating serous fluid to allow abdominal organs to move freely. Signup and view all the answers

Which of the following is NOT an intraperitoneal organ?

Duodenum Signup and view all the answers

What is the primary function of the greater omentum?

To cover most abdominal organs and accumulate adipose tissue Signup and view all the answers

What is the main difference between a short reflex and a long reflex in the regulation of the digestive system?

A short reflex is a local reflex that only involves the ENS, while a long reflex involves sensory input to the CNS and autonomic motor output. Signup and view all the answers

Chapter 26 Practice Questions

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Questions and Answers

Which of the following is NOT one of the six organs that make up the gastrointestinal (GI) tract?

Which of the following is an accessory organ involved in the digestive process?

What are the four tunics (layers) that make up the gastrointestinal wall?

Which layer of the gastrointestinal tract is responsible for absorption and secretion?

What is the main function of the enteric nervous system (ENS)?

Which tunic of the gastrointestinal tract wall contains blood vessels, lymph vessels, and nerves?

What is the main function of the muscularis layer of the gastrointestinal tract?

Which of the following is NOT a function of saliva?

Which salivary gland produces the largest amount of saliva?

What type of cells secrete mucin in the salivary glands?

How are salivary secretions regulated?

Which of the following is true about mastication?

What is the hardest substance in the body?

When do permanent teeth usually appear?

What is the function of the superior esophageal sphincter?

Which of the following is NOT a function of the stomach?

Which cells in the stomach produce and secrete packets of pepsinogen?

What is the function of intrinsic factor in the stomach?

Which cells in the stomach secrete the hormone gastrin?

Which layer of the peritoneum covers the internal organs' surface?

What is the primary cause of peritonitis?

What is the difference between a short reflex and a long reflex?

Which hormones participate in the regulation of digestion?

Which of the following is a primary function of stomach motility?

What happens during gastric mixing in the stomach?

What is the main force that moves chyme from the stomach into the duodenum?

What regulates the digestive processes in the stomach?

Which of the following is NOT one of the six organs that make up the gastrointestinal (GI) tract?

What is the primary cause of peritonitis?

Which of the following is NOT a function of saliva?

Which layer of the gastrointestinal tract is responsible for absorption and secretion?

What is the main function of the muscularis layer of the gastrointestinal tract?

What regulates the digestive processes in the stomach?

What is the function of the superior esophageal sphincter?

Which of the following is NOT a function of the oral cavity?

Which salivary gland produces the smallest amount of saliva?

What is the function of the uvula in the oral cavity?

What is the primary function of salivary amylase in the oral cavity?

Which layer of the gastrointestinal tract is lined with nonkeratinized stratified squamous epithelium?

What is the function of the inferior esophageal sphincter?

What is the primary cause of dental caries?

What is the main force that moves the bolus from the oropharynx to the esophagus during swallowing?

Which of the following is NOT a function of the stomach?

What is the main function of the gastric pit and gland in the stomach?

Which cells in the stomach produce hydrochloric acid?

What is the function of chief cells in the stomach?

Which of the following is NOT a function of stomach motility?

What is the main force that moves chyme from the stomach into the duodenum?

What is the function of the superior esophageal sphincter?

What is the primary cause of peritonitis?

Which of the following is true about the peritoneum?

Which of the following is NOT an intraperitoneal organ?

What is the primary function of the greater omentum?

What is the main difference between a short reflex and a long reflex in the regulation of the digestive system?

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