Question 1

Which of the following correctly lists the main parts of the alimentary canal in order from the mouth to the anus?

Accepted Answer

Mouth, pharynx, esophagus, stomach, small intestine, large intestine, anus

Question 2

A patient has a blockage preventing bile from entering the small intestine. Which digestive process would be most directly affected?

Accepted Answer

Emulsification of fats

Question 3

Which accessory organ produces enzymes that digest all major categories of food and also secretes bicarbonate to neutralize stomach acid?

Accepted Answer

Pancreas

Question 4

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

Accepted Answer

Muscularis externa

Question 5

A person is unable to form a proper bolus and has difficulty swallowing. Which accessory organ is most likely impaired?

Accepted Answer

Tongue

Question 6

Which of the following best describes segmentation in the small intestine?

Accepted Answer

Local, rhythmic contractions that mix food with digestive juices and push it against the intestinal wall

Question 7

Which process is defined as the passage of digested end products from the GI lumen through mucosal cells into the blood or lymph?

Accepted Answer

Absorption

Question 8

A patient with a damaged submucosal nerve plexus would most likely experience problems with which function?

Accepted Answer

Regulation of glandular secretions and local blood flow

Question 9

Which of the following is NOT a function of the mucosa layer of the alimentary canal?

Accepted Answer

Production of segmentation and peristalsis

Question 10

A patient presents with dry mouth and difficulty digesting starches. Which accessory organ is most likely malfunctioning?

Accepted Answer

Salivary glands

Question 11

Which of the following best describes peristalsis?

Accepted Answer

Alternating waves of contraction and relaxation of smooth muscle that move food distally along the GI tract

Question 12

If the serosa layer of the alimentary canal is damaged, which of the following is most likely to occur?

Accepted Answer

Increased friction between digestive organs and surrounding structures

Question 13

Which of the following is a correct pairing of an accessory organ and its primary digestive function?

Accepted Answer

Gallbladder – stores and concentrates bile

Question 14

A patient has a mutation that prevents the formation of sphincters in the GI tract. Which layer is most likely affected?

Accepted Answer

Muscularis externa

Question 15

Which digestive process is primarily voluntary and occurs only at the mouth?

Accepted Answer

Ingestion

Question 16

A patient is unable to absorb nutrients efficiently due to a loss of mucosal surface area in the small intestine. Which process is most directly impaired?

Accepted Answer

Absorption

Question 17

Which of the following best explains why the stomach can stretch to accommodate a large meal and then return to its original shape?

Accepted Answer

The submucosa contains elastic fibers

Question 18

Which of the following is a catabolic process involving enzymes that break complex food molecules into their chemical building blocks?

Accepted Answer

Chemical digestion

Question 19

A patient with a malfunctioning MALT (mucosa-associated lymphoid tissue) in the GI tract would be most susceptible to which of the following?

Accepted Answer

Infectious diseases of the digestive tract

Question 20

Which of the following scenarios best illustrates the process of defecation?

Accepted Answer

Elimination of indigestible residues from the body as feces via the anus

Chapter 23: The Digestive System – Structure and Function

Guida di studio - Domande di pratica

Study guide - Flashcard