Anatomy of Taste Buds and Papillae

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Questions and Answers

What type of epithelium is found in the loosely attached mucosa?

Cuboidal epithelium

Keratinized stratified squamous epithelium

Columnar epithelium

Non-keratinized stratified squamous epithelium (correct)

Which of the following is a characteristic of the firmly attached mucosa?

Thin keratinized stratified squamous epithelium (correct)

Columnar epithelium with many epithelial ridges

Cuboidal epithelium with few or no epithelial ridges

Thick non-keratinized stratified squamous epithelium

What is the function of the vestibular fornix?

To produce saliva

To produce mucus

To allow mobility of the tongue

To allow mobility of the lips and cheeks (correct)

Which papilla is associated with von Ebner salivary glands?

Circumvallate papilla Signup and view all the answers

What type of fibers are found in the lamina propria of the loosely attached mucosa?

Collagen and elastic fibers Signup and view all the answers

Which of the following is NOT a characteristic of the floor of the mouth?

Thick epithelium Signup and view all the answers

What is the function of the Weber salivary glands?

To produce pure mucous Signup and view all the answers

What is the term for the junction between the alveolar mucosa and the gingiva?

Mucogingival junction Signup and view all the answers

What type of collagen is present in anchoring fibers?

Type VII collagen Signup and view all the answers

What is the function of hemidesmosomes in epithelial cells?

To form mechanical adhesions with the basal lamina Signup and view all the answers

What is the characteristic of the epithelium in the hard palate?

Stratified squamous keratinized epithelium Signup and view all the answers

What is the term for the area between the gingiva and the alveolar mucosa?

Mucogingival junction Signup and view all the answers

What is the function of the gingival fibers?

To provide attachment to the tooth Signup and view all the answers

What is the characteristic of non-keratinized mucosa?

Loosely attached to underlying structures Signup and view all the answers

What is the term for the epithelial projections in the hard palate?

Epithelial rete pegs Signup and view all the answers

What is the function of the soft palate?

To separate the oral and nasal cavities Signup and view all the answers

What type of epithelium is present on the nasal side of the soft palate?

Respiratory epithelium Signup and view all the answers

What is the term for the area on the lip that separates the skin from the mucous membrane?

Vermilion border Signup and view all the answers

What is the primary function of the oral mucous membrane?

Protection Signup and view all the answers

Which layer of the oral mucosa is composed of connective tissue?

Lamina propria Signup and view all the answers

What is the name of the layer of connective tissue that extends into the deep surface of the epithelium?

Papillary layer Signup and view all the answers

Which of the following is NOT a function of the oral mucous membrane?

Respiration Signup and view all the answers

What is the name of the sensation that is sensed in the mouth through certain receptors?

All of the above Signup and view all the answers

Which part of the oral cavity is lined by the oral mucosa?

All of the above Signup and view all the answers

What is the name of the layer of the oral mucosa that is thicker in areas of masticatory mucosa?

Papillary layer Signup and view all the answers

What is the name of the part of the oral cavity that is located between the teeth and the lips?

Vestibular fornix Signup and view all the answers

Study Notes

Oral Mucosa

The oral mucosa is composed of two major components: oral epithelium and lamina propria.
Functions of the oral mucosa include protection, sensation, secretion, and thermal regulation.

Types of Oral Mucosa

There are three types of oral mucosa: keratinized mucosa (masticatory mucosa), non-keratinized mucosa (lining mucosa), and specialized mucosa.

Keratinized Mucosa (Masticatory Mucosa)

Found in areas subjected to forces and pressure during mastication, such as the gingiva and hard palate.
Characterized by stratified squamous keratinized epithelium, tall epithelial rete pegs, and dense lamina propria with numerous collagen fibers.

Non-Keratinized Mucosa (Lining Mucosa)

Found in areas not subjected to high levels of friction but is mobile and distensible, such as the soft palate, lip, cheek, ventral surface of the tongue, floor of the mouth, and vestibule.
Characterized by non-keratinized epithelium firmly attached to underlying muscles, with loosely attached mucosa to underlying structures.

Specialized Mucosa

Found on the dorsal surface of the tongue, with four types of papillae: fungiform, foliate, circumvallate, and filiform.
Each type of papilla has a specific function, such as taste sensation and mechanical protection.

Gingiva

Macro-anatomy includes the free gingiva, interdental papilla, attached gingiva, and mucogingival junction.
Histology includes stratified squamous keratinized epithelium, tall epithelial rete pegs, and dense lamina propria with numerous collagen fibers.

Palate

Macro-anatomy includes the incisive papilla, palatine gingiva, rugae area, antero-lateral area, postero-lateral area, and median palatine raphe.
Histology includes epithelial rete pegs, tall and numerous, with a mucosa consisting of a fatty zone and glandular zone.

Lip and Cheek

Characterized by non-keratinized epithelium firmly attached to underlying muscles, with loosely attached mucosa to underlying structures.
Histology includes a mucosa with a mixed salivary gland and a non-keratinized epithelium.

Tongue

Dorsal surface contains four types of papillae: fungiform, foliate, circumvallate, and filiform, each with a specific function.
Histology includes a mucosa with a stratified squamous epithelium and a lamina propria with numerous collagen fibers.

Lamina Propria

Divided into the papillary layer and reticular layer.
In areas of masticatory mucosa, the papillary layer is prominent, while in areas of lining mucosa, the reticular layer predominates.

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Description

This quiz covers the structure and function of taste buds and papillae, including fungiform, foliate, and circumvallate papillae, and their role in taste sensation.