RDH Anatomy & Physiology for Dental Hygienists

Question 1

Which bone forms the lower jaw and holds the lower teeth in place?

Accepted Answer

Mandible

Answer

The mandible is the single, largest, and strongest bone of the face, forming the lower jaw. It articulates with the temporal bones at the temporomandibular joints and contains the alveolar process that houses the lower teeth, making it central to mastication and facial structure.

Question 2

Which cranial nerve is primarily responsible for facial expressions?

Accepted Answer

Facial nerve (VII)

Answer

The Facial nerve (Cranial Nerve VII) is primarily responsible for controlling the muscles of facial expression. It allows for a wide range of movements, including smiling, frowning, blinking, and wrinkling the forehead, which are essential for non-verbal communication and emotional expression.

Question 3

What type of tissue primarily composes the gingiva?

Accepted Answer

Dense fibrous connective tissue

Answer

The gingiva, commonly known as the gums, is primarily composed of dense fibrous connective tissue covered by stratified squamous epithelium. This specialized tissue provides a firm, resilient barrier that protects the underlying alveolar bone and supports the teeth against mechanical forces during chewing.

Question 4

Which artery supplies blood to the maxillary teeth?

Accepted Answer

Posterior superior alveolar artery

Answer

The posterior superior alveolar artery is a direct branch of the maxillary artery, specifically responsible for supplying blood to the maxillary molars and premolars. It also provides blood to the surrounding gingiva and the alveolar bone in the posterior maxilla, ensuring their vitality and health.

Question 5

Which muscle elevates the mandible during chewing?

Accepted Answer

Masseter

Answer

The masseter is one of the most powerful muscles of mastication, originating from the zygomatic arch and inserting into the lateral surface of the mandible. Its primary function is to elevate the mandible, forcefully closing the jaw during chewing and biting.

Uncategorized Practice Test

Uncategorized Practice Test

RDH Anatomy & Physiology for Dental Hygienists