Dental Assistant Practice Exam

What type of mucosa would you typically find in the floor of the mouth?

1. Lining mucosa

2. Masticatory mucosa

3. Specialized mucosa

4. Keratinized mucosa

The correct answer is: Lining mucosa

The floor of the mouth is lined with lining mucosa, which is characterized by its soft, flexible, and less keratinized structure. This type of mucosa is important for protecting the underlying tissues while allowing for movement and flexibility in the oral cavity. The lining mucosa here provides a smooth surface that aids in functions such as chewing and swallowing. Its rich blood supply also allows for faster healing, which is beneficial in this area of the mouth where injury can occur frequently due to various activities such as eating. In contrast, masticatory mucosa is found in areas that experience more abrasion, like the hard palate and the gingiva, and is typically keratinized to offer more durability. Specialized mucosa, on the other hand, is found on the dorsum of the tongue and is associated with taste and specific sensory functions, reflecting a distinct structure and function compared to the general lining found in the floor of the mouth. Keratinized mucosa, although present in some parts of the oral cavity, is not the primary type of mucosa found in the floor of the mouth, which instead relies on the properties of lining mucosa for its specific functions.