Illustrated Dental Embryology Histology And Anatomy 4th Edition By Margaret – Test Bank

Chapter 11: Head and Neck Structures

MULTIPLE CHOICE

1. In a lymph node, the B-cell lymphocytes mature within the:
a. hilus.
b. capsule.
c. lymph vessel.
d. germinal center.

ANS: D
Each lymphatic nodule has a germinal center containing many immature lymphocytes. As they mature, these lymphocytes enter either the area of the nodule surrounding the germinal center or the lymph. These mature lymphocytes are of the B-cell type and are mainly involved in the humoral immune response with immunoglobulin production by the plasma cells.

REF: Chapter 11, Lymph Nodes, Page 143

2. In salivary glands, which of the following structures is composed of secretory epithelial cells?
a. Acinus
b. Capsule
c. Lobule
d. Excretory duct

ANS: A
Secretory cells are found in a group, or acinus. Connective tissue surrounds the epithelium, protecting and supporting the gland. The connective tissue of the gland is divided into the capsule, which surrounds the outer part of the entire gland, and the septa. Each septum helps divide the inner part of the gland into the larger lobes and smaller lobules. The final part of the salivary gland ductal system is the excretory duct, or secretory duct, which is located in the septum of the gland.

REF: Chapter 11, Secretory Cells and Acini, Page 134

3. The connective tissue capsule surrounding the salivary gland is continuous with the connective tissue septa that run between the epithelial components, creating:
a. nodes and nodules.
b. ducts and acinus.
c. lobes and lobules.
d. channels and ducts.

ANS: C
The connective tissue of the gland is divided into the capsule, which surrounds the outer part of the entire gland, and the septa. Each septum helps divide the inner part of the gland into the larger lobes and smaller lobules.

REF: Chapter 11, Salivary Gland Histology, Page 134

4. The foramen cecum of the tongue is a:
a. groove pointing toward the pharynx.
b. median line demarcating the fusion of the tongue.
c. depression at the apex of the sulcus terminalis.
d. collection of diffuse tonsillar tissue.

ANS: C
The foramen cecum, which is the opening of the thyroglossal duct, is a small, pitlike depression located where the sulcus terminalis points backward toward the oropharynx. This duct shows the origin of the thyroid and the migration pathway of the thyroid gland into the neck region.

REF: Chapter 11, Thyroid Gland Development, Page 140

5. The reduction in the amount of glandular secretion noted in patients with xerostomia is called:
a. dysplasia.
b. hyposalivation.
c. cystic transformation.
d. ossification.

ANS: B
The decreased production of saliva is considered hyposalivation and can result in xerostomia, or dry mouth.

REF: Chapter 11, Clinical Considerations for Salivary Gland Pathology, Page 139

6. Which of the following salivary glands are associated with the circumvallate lingual papillae and secrete only serous saliva?
a. von Ebner
b. Sublingual
c. Submandibular
d. Bartholin

ANS: A
The von Ebner salivary glands are associated with the larger circumvallate lingual papillae on the posterior part of the dorsal surface of the tongue. These glands contain only serous acini and thus secrete only a watery serous secretory product. The sublingual gland has mainly mucous but with some mucous acini with serous demilunes. The submandibular gland secretes a more viscous mixed secretory product than the parotid, but it is mainly serous because it has both serous and mucous acini with serous demilunes. The short ducts associated with the sublingual gland combine to form the sublingual duct or Bartholin duct.

REF: Chapter 11, Minor Salivary Glands, Page 137

7. Which of the following paranasal sinuses may be compromised with a periapical infection in a permanent maxillary molar?
a. Maxillary sinus
b. Frontal sinus
c. Sphenoidal sinus
d. Ethmoidal sinuses

ANS: A
Because the roots of the maxillary posterior teeth are in close proximity to the maxillary sinus, maxillary sinusitis can sometimes result as infection spreads from a periapical abscess associated with one of the roots of a maxillary posterior tooth.

REF: Chapter 11, Clinical Considerations for Nasal Cavity and Paranasal Sinus Pathology, Page 146

8. Which of the following salivary glands is unencapsulated?
a. Submandibular gland
b. Parotid gland
c. Sublingual gland
d. Both parotid and sublingual glands

ANS: C
The sublingual salivary gland is the only unencapsulated major salivary gland. Both the parotid and submandibular salivary glands are encapsulated major salivary glands.

REF: Chapter 11, Major Salivary Glands, Page 137

9. Where is the tonsillar tissue located in the oral cavity?
a. Epithelium
b. Lamina propria
c. Basement membrane
d. Submucosa

ANS: B
Intraoral tonsillar tissue consists of nonencapsulated masses of lymphoid tissue located in the lamina propria of the oral mucosa. It is covered by stratified squamous epithelium that is continuous with the surrounding oral mucosa.

REF: Chapter 11, Intraoral Tonsillar Tissue, Page 143

10. The palatine tonsils are two rounded masses of variable size located between the:
a. lymph nodes.
b. parathyroid glands.
c. faucial pillars.
d. base and body of the tongue.

ANS: C
The palatine tonsils are two rounded masses of variable size located between the anterior and posterior faucial pillars. The lingual tonsil is an indistinct layer of diffuse lymphoid tissue located on the base of the dorsal surface of the tongue, posterior to the circumvallate lingual papillae. The parathyroid glands are within the thyroid gland. Lymph nodes are found throughout the head and neck regions.

REF: Chapter 11, Intraoral Tonsillar Tissue, Page 143