Question 1

Which layer of the alimentary canal is primarily responsible for peristalsis and segmentation movements?

Accepted Answer

Muscularis Externa

Question 2

A patient presents with chronic heartburn. Which anatomical structure is most likely malfunctioning, allowing stomach acid to enter the esophagus?

Accepted Answer

Cardiac sphincter (LES)

Question 3

Which of the following correctly lists the pathway food follows through the digestive tract?

Accepted Answer

Mouth → pharynx → esophagus → stomach → small intestine → large intestine → rectum → anus

Question 4

Which enzyme found in saliva begins the chemical digestion of carbohydrates in the mouth?

Accepted Answer

Amylase

Question 5

What is the primary function of bile salts produced by the liver?

Accepted Answer

Emulsify lipids for digestion

Question 6

A patient with cirrhosis has a liver largely replaced by scar tissue. Which of the following is NOT a common cause of cirrhosis?

Accepted Answer

Gallstones

Question 7

Which region of the small intestine is primarily responsible for nutrient absorption?

Accepted Answer

Jejunum

Question 8

Which of the following is a function of the large intestine?

Accepted Answer

Reabsorption of water and compaction of waste

Question 9

Which component of a tooth is the hardest biologically manufactured substance and cannot be replaced once worn down?

Accepted Answer

Enamel

Question 10

During swallowing, which phase involves voluntary movement of the bolus from the mouth into the esophagus?

Accepted Answer

Buccal phase

Question 11

Which of the following is a risk factor for developing gallstones, according to the '5 F's'?

Accepted Answer

Fair skin

Question 12

What is the main function of the pancreatic juice in the digestive system?

Accepted Answer

Neutralizes stomach acid and provides digestive enzymes

Question 13

Which structure prevents food from entering the nasal cavity during swallowing?

Accepted Answer

Uvula

Question 14

A patient is unable to absorb vitamin B12 due to lack of intrinsic factor. Which cells in the stomach are responsible for producing intrinsic factor?

Accepted Answer

Parietal cells

Question 15

Which process involves cyclic contractions that mix and separate the bolus of food in the alimentary canal?

Accepted Answer

Segmentation

Question 16

Which anatomical feature of the small intestine increases its surface area for absorption?

Accepted Answer

Plicae circulares with villi and microvilli

Question 17

Which part of the tooth contains blood vessels and nerves?

Accepted Answer

Pulp cavity

Question 18

Which of the following is true regarding the esophagus?

Accepted Answer

It contains both skeletal and smooth muscle

Question 19

Which vitamin is produced by intestinal flora in the large intestine and absorbed there?

Accepted Answer

Vitamin B and K

Question 20

A patient with appendicitis is at risk for which serious complication if left untreated?

Accepted Answer

Rupture and peritonitis

Digestive System: Structure, Function, and Associated Organs

Study Guide - Practice Questions