National Board Dental Hygiene Examination (NBDHE) Dental Hygienist Practice Test

What is the primary function of saliva in oral health?

1. Protect against pathogens

2. Facilitate taste

3. Assist in speech

4. All of the above

The correct answer is: All of the above

The primary function of saliva in oral health encompasses a variety of essential roles, and choosing the option that includes all functions highlights its multifaceted importance. Saliva protects against pathogens by providing a barrier and containing antimicrobial components such as lysozyme and lactoferrin, which help to inhibit the growth of bacteria and other microorganisms in the oral cavity. This protective quality is crucial for maintaining overall oral health and preventing infections. Additionally, saliva facilitates taste by dissolving food particles, allowing taste receptors on the tongue to effectively detect different flavors. This process is important not only for the enjoyment of food but also for stimulating the digestive process, which begins in the mouth. Moreover, saliva plays a significant role in assisting with speech. It helps lubricate the oral cavity, allowing for smoother movement of the tongue and other structures necessary for sound production. Choosing the option that includes all these functions captures the comprehensive role of saliva in oral health, emphasizing that it contributes to protection against pathogens, facilitates taste, and assists in speech. Each of these aspects is integral to maintaining not only oral health but also general well-being.