Digestive System Structures and Functions Quiz

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What is the function of intrinsic factor secreted in the small intestine?

Enhances carbohydrate breakdown
Aids in the absorption of vitamin C
Assists in the absorption of vitamin B12 (correct)
Stimulates protein digestion

Which organ produces bile salts to emulsify lipids for digestion?

Liver (correct)
Gallbladder
Pancreas
Stomach

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

Store and concentrate bile
Produce intrinsic factor
Produce digestive enzymes and bicarbonate (correct)
Absorb nutrients from food

Which hormone stimulates the release of gastric acid in the stomach?

Gastrin (D) Signup and view all the answers

What type of reflex is characterized by local stimulus and result within the digestive tract?

Short reflex (D) Signup and view all the answers

What is the pH range of saliva, which contains water, ions, enzymes, and glycoproteins?

6.35-6.85 (A) Signup and view all the answers

What is the primary function of the digestive system?

To break down food and absorb nutrients (A) Signup and view all the answers

Which of the following is NOT a part of the digestive system?

Lungs (C) Signup and view all the answers

What is the function of the muscularis layer in the digestive tract?

To facilitate mechanical digestion and peristalsis (D) Signup and view all the answers

Which of the following is NOT an accessory digestive organ?

Pancreas (D) Signup and view all the answers

What is the function of the enteric nervous system?

To regulate the digestive system's motility and secretions (C) Signup and view all the answers

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

To ingest, chew, and moisten food (B) Signup and view all the answers

What is the function of the lower esophageal sphincter?

Controls food entering the stomach (B) Signup and view all the answers

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

Fundus (B) Signup and view all the answers

What is the primary function of parietal cells in the stomach?

Produce hydrochloric acid (C) Signup and view all the answers

Which phase of gastric secretion is triggered by the sight, smell, taste, or thought of food?

Cephalic phase (A) Signup and view all the answers

What is the primary function of mucosal barrier in the stomach?

Protect against acidic environment (C) Signup and view all the answers

Which part of the small intestine is responsible for most absorption and is the longest segment?

Ileum (B) Signup and view all the answers

What initiates mechanical digestion in the small intestine by moving chyme through peristalsis?

Motilin hormone (C) Signup and view all the answers

What prevents simultaneous passage of feces and gas in the rectum?

Lateral bends (C) Signup and view all the answers

What is the primary function of intrinsic factor in the stomach?

Essential for life (D) Signup and view all the answers

What is the primary function of the internal anal sphincter and external anal sphincter?

To remain normally closed and prevent leakage (D) Signup and view all the answers

Which of the following statements about the bacterial flora in the digestive system is correct?

They are constantly tested by dendrites to ensure they are not pathogenic. (B) Signup and view all the answers

What is the primary function of the valsalva maneuver?

To voluntarily increase intra-abdominal pressure for the removal of feces (C) Signup and view all the answers

Which of the following statements about the liver is correct?

The liver processes and removes toxins from the body. (A) Signup and view all the answers

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

To emulsify lipids for better absorption (B) Signup and view all the answers

Which of the following statements about the pancreas is correct?

It has both exocrine and endocrine functions related to digestion. (D) Signup and view all the answers