Digestive System Chapter 23.1 Quiz

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Questions and Answers

What type of epithelium is found in the mouth and esophagus?

Pseudostratified columnar
Keratinized stratified squamous (correct)
Simple columnar
Simple squamous

Which layer always remains in a state of tension in the gastrointestinal tract?

Muscularis
Muscularis mucosa (correct)
Submucosa
Lamina propria

Which digestive organ is responsible for the production of bile?

Gallbladder
Pancreas
Salivary glands
Liver (correct)

What type of muscle is responsible for peristalsis in the small intestine?

Smooth muscle (B) Signup and view all the answers

What is the main function of goblet cells in the gastrointestinal tract?

Produce mucus (B) Signup and view all the answers

Which layer contains a collection of nerves known as the submucosal plexus?

Submucosa (C) Signup and view all the answers

What is the primary function of chemical digestion?

Breaking down complex food molecules into building blocks (B) Signup and view all the answers

What triggers the release of digestive juices in a short reflex?

Expansion of the stomach (C) Signup and view all the answers

Which hormone stimulates the release of gastric acid?

Gastrin (B) Signup and view all the answers

What is the function of the uvula in the mouth?

To prevent food from entering the nasal cavity (C) Signup and view all the answers

Which organ primarily absorbs nutrients into the bloodstream or lipids into the lymphatic system?

Small intestine (A) Signup and view all the answers

What type of control activates glands and muscles based on signals like expansion of the stomach and type of nutrient?

Neural control (C) Signup and view all the answers

What is the primary function of the lower esophageal sphincter?

To control food entering the stomach and prevent acid reflux (B) Signup and view all the answers

How long does the process of swallowing (deglutition) take for solid food?

4-8 seconds (B) Signup and view all the answers

Which part of the stomach is responsible for storing undigested food and gases?

Fundus (B) Signup and view all the answers

What is the term used to describe the folds in the stomach when it is empty?

Rugae (B) Signup and view all the answers

Which muscle in the stomach is responsible for churning and mixing food?

Oblique muscle (C) Signup and view all the answers

Does a person's body weight correlate with the size of their stomach?

No, body weight does not correlate with stomach size (D) Signup and view all the answers

What is the primary function of the serosa layer of the stomach?

To provide a smooth, lubricating surface for the stomach to move against the abdominal wall (A) Signup and view all the answers

What is the main role of the enteric nervous system in the digestive process?

To control the overall motility of the gastrointestinal tract (B) Signup and view all the answers

What is the function of the parasympathetic nervous system in relation to the digestive process?

To increase gastrointestinal secretions and motility (B) Signup and view all the answers

What is the primary purpose of the hepatic portal system in the digestive process?

To transport protein and carbohydrate from the intestines to the liver (A) Signup and view all the answers

What is the main function of the peritoneum in relation to the digestive organs?

To hold the digestive organs in their proper anatomical positions (A) Signup and view all the answers

What is the primary role of the mouth in the digestive process?

To initiate the chemical breakdown of carbohydrates and lipids (A) Signup and view all the answers

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

To mix food with gastric juices and begin chemical breakdown of proteins (D) Signup and view all the answers

Which of the following is not a function of the small intestine?

Producing bile salts to emulsify lipids (D) Signup and view all the answers

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

To produce digestive enzymes and bicarbonate (C) Signup and view all the answers

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

To store, concentrate, and release bile (D) Signup and view all the answers

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

To expose a larger surface area to digestive juices (B) Signup and view all the answers

What is the last voluntary act in the swallowing process until defecation?

Swallowing (C) Signup and view all the answers

Flashcards

Mouth/Esophagus Epithelium Type?

Keratinized stratified squamous

GI Tract Layer in Tension?

Muscularis mucosa