Digestive System Nerve Supply and Layers Quiz

What is the main function of the enteric nervous system in the alimentary canal?

To provide taste sensation and avoid self-injury during chewing

To transport nutrients and oxygen to the organs of the alimentary canal

To restrict the activity of the autonomic nervous system

To regulate digestive secretions and motor functions (correct)

What is the primary role of the parasympathetic nervous system in the alimentary canal?

To increase gastrointestinal secretion and motility (correct)

To transport nutrients and oxygen to the organs of the alimentary canal

To restrict the activity of the enteric neurons

To hold the digestive organs in place within the abdominal cavity

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

To release food to the duodenum for further digestion

To propel food slowly through the small intestine

To absorb some fat-soluble substances like alcohol and aspirin

To mix food with gastric juices and begin the chemical breakdown of proteins (correct)

What is the role of the pancreas in the digestive process?

To produce digestive enzymes and bicarbonate to neutralize acidic chyme Signup and view all the answers

What is the primary function of the hepatic portal system in the alimentary canal?

To transport protein and carbohydrate to the liver Signup and view all the answers

What is the primary function of the large intestine in the digestive process?

To further break down food residue and absorb residual water, electrolytes, and vitamins Signup and view all the answers

What is the main role of the parietal peritoneum in the alimentary canal?

To line the abdominal wall Signup and view all the answers

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

To begin the chemical breakdown of carbohydrates and lipids Signup and view all the answers

What is the purpose of mechanical digestion in the digestive process?

To expose a larger surface area of food to digestive juices Signup and view all the answers

What is the role of the liver in the digestive process?

To produce bile salts to emulsify lipids for digestion and absorption Signup and view all the answers

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

To propel food to the esophagus Signup and view all the answers

What is the purpose of peristalsis in the digestive process?

To propel food through the alimentary canal Signup and view all the answers

What is the role of the muscularis layer in the digestive system?

Mechanical digestion and peristalsis Signup and view all the answers

Which part of the digestive system is lined with non-keratinized, stratified squamous epithelium?

Mouth Signup and view all the answers

What is the role of the mucosa layer in the digestive system?

Absorption of nutrients Signup and view all the answers

Which organ is NOT considered part of the alimentary canal or gastrointestinal (GI) tract?

Liver Signup and view all the answers

Where does mechanical digestion primarily occur in the digestive system?

Stomach Signup and view all the answers

Which layer of the GI tract contains a collection of nerves called the submucosal plexus?

Submucosa Signup and view all the answers

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

Stimulate release of gastric acid Signup and view all the answers

Which structure drops down from the soft palate to prevent food from entering the nasal cavity?

Uvula Signup and view all the answers

What is the function of short reflexes in the digestive system?

Stimulate release of digestive juices Signup and view all the answers

How does hormonal control influence pancreatic secretion?

Stimulates bicarbonate release Signup and view all the answers

Which of the following is NOT a function of the tongue in digestion?

Absorption Signup and view all the answers

What type of stimuli can trigger long reflexes in the digestive system?

Smell, sight, and taste of food Signup and view all the answers

Which of the following statements about the chemical digestive process is correct?

Excessive methane gas production can occur with certain foods due to bacterial action. Signup and view all the answers

Which of the following is NOT a component of feces?

Digestive enzymes Signup and view all the answers

What is the primary function of the Valsalva maneuver?

To remove feces by increasing intra-abdominal pressure. Signup and view all the answers

What happens if defecation is delayed for too long?

More water is absorbed, making the feces firmer and leading to constipation. Signup and view all the answers

Which of the following statements about the liver is correct?

Bile is produced by the liver and aids in the emulsification of lipids in the small intestine. Signup and view all the answers

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

To perform both exocrine and endocrine functions related to digestion. Signup and view all the answers