Digestive System Overview

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What is the main function of the muscularis layer of the alimentary canal?

To control the movement of contents through the canal (correct)

To secrete digestive enzymes

To provide structural support for the canal

To increase surface area for absorption

What is the role of the epithelium in the mucosa of the alimentary canal?

To control the movement of the canal

To provide a protective barrier (correct)

To absorb nutrients from the food

To secrete digestive enzymes

What is the role of the lamina propria in the mucosa of the alimentary canal?

To contain blood vessels, lymphatic vessels, and lymphocytes (correct)

To provide a protective barrier

To secrete digestive enzymes

To control the movement of the canal

What is the purpose of the accessory organs of the digestive system?

To break down food mechanically Signup and view all the answers

What is the primary function of the submucosa layer in the alimentary canal?

To contain blood and lymphatic vessels, as well as nerves Signup and view all the answers

How do the nerves affect the digestive system?

They cause an increase in digestive activity Signup and view all the answers

What is the primary function of the myenteric plexus in the muscularis?

To control contractions of the alimentary canal Signup and view all the answers

What is the main function of the hepatic portal system?

To take nutrient-rich blood from the small intestine to the liver Signup and view all the answers

What is the primary difference between propulsion and peristalsis?

Propulsion is voluntary, while peristalsis is automatic Signup and view all the answers

What is the main function of the tongue in the digestive process?

To gather food into a bolus and position it for swallowing Signup and view all the answers

What is the primary function of saliva in the digestive process?

To start the chemical digestion of carbohydrates Signup and view all the answers

What is the primary function of the pharynx in the digestive system?

To regulate the flow of food and air through the upper digestive tract Signup and view all the answers

What is the primary function of the esophageal sphincters?

To regulate the flow of food from the esophagus to the stomach Signup and view all the answers

What is the primary function of the stomach in the digestive process?

To mix the food and convert it into chyme Signup and view all the answers

What is the relationship between the size of the stomach and a person's body weight?

The stomach size can vary independently of the person's body weight Signup and view all the answers

What is the primary role of the medulla oblongata in the swallowing process?

To facilitate the automatic muscular contractions of the pharyngeal and esophageal phases of swallowing Signup and view all the answers

What is the primary function of the ileocecal sphincter?

To prevent backflow of chyme into the small intestine Signup and view all the answers

What is the approximate length of the anal canal?

2 inches Signup and view all the answers

What is the primary function of the Valsalva maneuver in the digestive system?

To increase abdominal pressure and force out feces Signup and view all the answers

Which of the following is NOT a type of mechanical digestion that occurs in the large intestine?

Segmentation contractions Signup and view all the answers

What is the primary function of the hepatic portal vein?

To bring digested and absorbed nutrients to the liver Signup and view all the answers

What is the main purpose of bile secreted by the liver?

To emulsify and digest lipids in the small intestine Signup and view all the answers

What is the primary function of pancreatic amylase?

To break down disaccharides and polysaccharides into monosaccharides Signup and view all the answers

What is the primary function of the hepatic artery?

To bring oxygenated blood to the liver Signup and view all the answers

What is the main function of the gallbladder in the digestive system?

To store, concentrate, and release bile into the duodenum Signup and view all the answers

What is the primary role of the dendritic cells in the large intestine?

To monitor the bacterial flora and bring samples to T cells Signup and view all the answers

What is the function of the pyloric sphincter?

Control the movement of food leaving the stomach Signup and view all the answers

Which cell type in the stomach secretes hydrochloric acid and intrinsic factor?

Parietal cells Signup and view all the answers

What is the primary role of intrinsic factor in the digestive system?

Facilitate absorption of vitamin B12 Signup and view all the answers

Which phase of gastric secretion occurs when you smell or think of food?

Cephalic phase Signup and view all the answers

What role does the mucosal barrier play in the stomach?

Prevents digestion of the stomach by gastric juices Signup and view all the answers

Which part of the small intestine connects the duodenum to the ileum?

Jejunum Signup and view all the answers

What is the function of villi in the small intestine?

Increase surface area for absorption Signup and view all the answers

What do microvilli in the small intestine do?

Enhance absorption and finish digestion Signup and view all the answers

When does segmentation occur most frequently within the small intestine?

Duodenum Signup and view all the answers

What hormone is secreted to stop segmentation and start peristalsis after most chyme has been absorbed?

Motilin Signup and view all the answers

Digestive System Overview

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Questions and Answers

What is the main function of the muscularis layer of the alimentary canal?

What is the role of the epithelium in the mucosa of the alimentary canal?

What is the role of the lamina propria in the mucosa of the alimentary canal?

What is the purpose of the accessory organs of the digestive system?

What is the primary function of the submucosa layer in the alimentary canal?

How do the nerves affect the digestive system?

What is the primary function of the myenteric plexus in the muscularis?

What is the main function of the hepatic portal system?

What is the primary difference between propulsion and peristalsis?

What is the main function of the tongue in the digestive process?

What is the primary function of saliva in the digestive process?

What is the primary function of the pharynx in the digestive system?

What is the primary function of the esophageal sphincters?

What is the primary function of the stomach in the digestive process?

What is the relationship between the size of the stomach and a person's body weight?

What is the primary role of the medulla oblongata in the swallowing process?

What is the primary function of the ileocecal sphincter?

What is the approximate length of the anal canal?

What is the primary function of the Valsalva maneuver in the digestive system?

Which of the following is NOT a type of mechanical digestion that occurs in the large intestine?

What is the primary function of the hepatic portal vein?

What is the main purpose of bile secreted by the liver?

What is the primary function of pancreatic amylase?

What is the primary function of the hepatic artery?

What is the main function of the gallbladder in the digestive system?

What is the primary role of the dendritic cells in the large intestine?

What is the function of the pyloric sphincter?

Which cell type in the stomach secretes hydrochloric acid and intrinsic factor?

What is the primary role of intrinsic factor in the digestive system?

Which phase of gastric secretion occurs when you smell or think of food?

What role does the mucosal barrier play in the stomach?

Which part of the small intestine connects the duodenum to the ileum?

What is the function of villi in the small intestine?

What do microvilli in the small intestine do?

When does segmentation occur most frequently within the small intestine?

What hormone is secreted to stop segmentation and start peristalsis after most chyme has been absorbed?

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