Question 1

Which structure forms the roof of the oral cavity and is composed of both bone and muscle?

Accepted Answer

Hard palate

Question 2

A patient presents with difficulty closing off the nasopharynx during swallowing. Which structure is most likely impaired?

Accepted Answer

Soft palate

Question 3

Which of the following statements about papillae on the tongue is correct?

Accepted Answer

Taste buds are located in the grooves between papillae.

Question 4

What is the dental formula for permanent teeth in humans?

Accepted Answer

$$2I, 1C, 2P, 3M 	imes 2$$

Question 5

Which layer of a tooth is responsible for its hardness and resistance to decay?

Accepted Answer

Enamel

Question 6

A patient has swelling near the ear and difficulty opening their mouth. Which salivary gland is most likely affected?

Accepted Answer

Parotid gland

Question 7

Which region of the esophagus contains only smooth muscle in its muscularis layer?

Accepted Answer

Lower esophagus

Question 8

The gastroesophageal sphincter regulates the opening between which two structures?

Accepted Answer

Esophagus and stomach

Question 9

Which region of the stomach is directly attached to the greater omentum?

Accepted Answer

Greater curvature

Question 10

What is the function of the pyloric sphincter?

Accepted Answer

Regulates movement of chyme from stomach to duodenum

Question 11

Which structural feature is unique to the small intestine and increases its surface area for absorption?

Accepted Answer

Villi

Question 12

A patient with a deficiency in Brunner’s glands would most likely have impaired protection against acidic chyme in which segment?

Accepted Answer

Duodenum

Question 13

Which segment of the small intestine contains Peyer’s patches in its mucosal layer?

Accepted Answer

Ileum

Question 14

The presence of food in the stomach triggers the opening of which valve?

Accepted Answer

Ileocecal valve

Question 15

Which anatomical feature of the large intestine is responsible for creating haustra?

Accepted Answer

Teniae coli

Question 16

Which layer of the large intestine contains abundant mucus-producing goblet cells?

Accepted Answer

Mucosal layer

Question 17

During defecation, which sphincter is voluntarily controlled?

Accepted Answer

External anal sphincter

Question 18

Which of the following best describes the anatomical position of the sigmoid colon?

Accepted Answer

Intraperitoneal and enters the true pelvis

Question 19

A patient with inflammation of the appendix is at risk for infection spreading to which region?

Accepted Answer

Cecum

Question 20

Which muscle maintains the anorectal angle and is important for continence?

Accepted Answer

Levator ani

Digestive System: Structure and Function of the Alimentary Canal

Study Guide - Practice Questions