Question 1

Which of the following best describes the function of the alimentary canal in the digestive system?

Accepted Answer

It is a continuous muscular tube that digests food and absorbs fragments into the blood.

Question 2

Which accessory digestive organ is primarily responsible for the initial mechanical breakdown of food?

Accepted Answer

Teeth

Question 3

During peristalsis, what is the primary mechanism that propels food through the alimentary canal?

Accepted Answer

Alternating waves of contraction and relaxation of smooth muscle

Question 4

Which layer of the alimentary canal is responsible for secreting mucus, digestive enzymes, and hormones?

Accepted Answer

Mucosa

Question 5

A patient presents with inflammation of the peritoneum following a ruptured appendix. What is the most likely diagnosis?

Accepted Answer

Peritonitis

Question 6

Which of the following statements about the enteric nervous system is correct?

Accepted Answer

It controls GI tract motility and communicates extensively within the gut wall.

Question 7

Which nerve plexus in the GI tract primarily regulates glands and smooth muscle in the mucosa?

Accepted Answer

Submucosal nerve plexus

Question 8

What effect does the parasympathetic nervous system have on digestive processes?

Accepted Answer

It enhances digestive processes.

Question 9

Which of the following is NOT a function of saliva?

Accepted Answer

Absorbs nutrients directly into the bloodstream

Question 10

A patient with Sjogren's syndrome is likely to experience which oral symptom due to reduced salivary gland function?

Accepted Answer

Dry mouth (xerostomia)

Question 11

Which type of papillae on the tongue does NOT contain taste buds and is responsible for providing friction?

Accepted Answer

Filiform papillae

Question 12

Which of the following best describes the dental formula for permanent teeth in humans?

Accepted Answer

$$2I, 1C, 2PM, 3M ($$upper jaw) / $$2I, 1C, 2PM, 3M ($$lower jaw)$

Question 13

Which tissue anchors the tooth in its bony socket and forms a fibrous joint called a gomphosis?

Accepted Answer

Periodontal ligament

Question 14

A patient with neglected gingivitis is at risk for which serious complication that may also increase risk for heart disease?

Accepted Answer

Periodontitis

Question 15

Which of the following is a correct sequence of the layers of the alimentary canal from innermost to outermost?

Accepted Answer

Mucosa, submucosa, muscularis externa, serosa

Question 16

Which of the following best explains why enamel cannot heal itself after damage?

Accepted Answer

Enamel-producing cells degenerate when the tooth erupts.

Question 17

Which process involves the passage of digested fragments from the lumen of the GI tract into the blood or lymph?

Accepted Answer

Absorption

Question 18

Which of the following is a function of the lamina propria in the mucosa of the alimentary canal?

Accepted Answer

Provides capillaries for nourishment and absorption

Question 19

A patient with an impacted wisdom tooth is most likely to experience which of the following symptoms?

Accepted Answer

Pressure and pain in the jaw

Question 20

Which of the following best describes the role of the mesentery in the abdominal cavity?

Accepted Answer

It holds organs in place and provides routes for blood vessels, lymphatics, and nerves.

Digestive System: Structure and Function (Anatomy & Physiology, Chapter 22) 1

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