Question 1

The articular fossa undergoes which developmental change?

Accepted Answer

The articular fossa deepens and expands during development to form a more concave surface for articulation with the mandibular condyle.

Question 2

Which of the following is not a function of the temporomandibular joint (TMJ)?

Accepted Answer

The temporomandibular joint (TMJ) is primarily responsible for mastication (chewing) and speech. It also plays a secondary role in deglutition (swallowing). However, it is not involved in respiration (breathing).

Question 3

The lateral pterygoid muscle does which of the following?

Accepted Answer

The lateral pterygoid muscle is responsible for protruding the mandible and pulling the articular disk forward. This action is essential for proper mouth opening and closing movements.

Question 4

The synovial membrane is associated with numerous capillaries and _________.

Accepted Answer

The answer of The synovial membrane is associated with numerous...

Question 5

Articular remodeling is a response to _______________.

Accepted Answer

Articular remodeling is a response to environmental stress such as excessive or abnormal loading on a joint, injury, or disease. It involves changes in the structure and composition of joint tissues to adapt to the stressors and maintain joint function. Aging, inactivity, and genetic dysfunction can also lead to changes in joint structure and function, but they may not necessarily involve the same type of remodeling response.

Question 6

Which of the following ligaments do not support the temporomandibular joint?

Accepted Answer

The stylohyoid ligament does not support the temporomandibular joint. The stylomandibular and sphenomandibular ligaments both support the joint, while the temporomandibular ligament is the primary ligament that supports and connects the mandible to the skull.

Question 7

Which feature of the TMJ helps it withstand functional stress?

Accepted Answer

The answer of Which feature of the TMJ helps it...

Question 8

Chondroblasts of the mandibular condyles are organized in long rows.

Accepted Answer

Chondroblasts in the mandibular condyles are not organized in long rows; instead, they are found in the cartilage layer of the condyle, where they are involved in the production of new cartilage matrix but are not specifically organized in long rows.

Question 9

The heads of mandibular condyles form secondary ossification centers.Secondary ossification centers produce epiphyseal lines (cartilage-bone junctions).

Accepted Answer

The answer of The heads of mandibular condyles form secondary...

Question 10

Where is the temporomandibular fossa located?

Accepted Answer

The temporomandibular fossa is located at the posterior medial aspect of the zygomatic arch, where it accommodates the condylar process of the mandible, forming part of the temporomandibular joint.

Question 11

At birth,condylar heads are round and covered with a thick layer of cartilage.

Accepted Answer

This is true. At birth, condylar heads are round and covered with a thick layer of cartilage. Over time, this cartilage will be replaced with bone as the jaw grows and develops.

Question 12

Which of the following is a function of the temporomandibular joint capsule?

Accepted Answer

The answer of Which of the following is a function...

Question 13

A mature mandibular condyle is which shape?

Accepted Answer

The answer of A mature mandibular condyle is which shape?
...

Question 14

When the mouth opens,each condylar head slides along the articular ________.

Accepted Answer

The answer of When the mouth opens,each condylar head slides...

Question 15

Which ligament attaches to the lateral part of the disk?

Accepted Answer

The temporomandibular ligament attaches to the lateral part of the disk, providing support to the temporomandibular joint (TMJ).

Question 16

Which of the following is a function of the lateral ligament of the temporomandibular joint?

Accepted Answer

The lateral ligament of the temporomandibular joint supports the joint and limits excursions of the condyles to a normal range.

Question 17

Which ligament extends down the medial side of the ramus to insert on the lingula?

Accepted Answer

The sphenomandibular ligament extends down the medial side of the mandibular ramus and inserts on the lingula of the mandible. The stylomandibular ligament runs from the styloid process to the angle of the mandible, and the temporomandibular ligament runs from the zygomatic process to the condyle of the mandible. The stylohyoid ligament runs from the styloid process to the hyoid bone.

Question 18

Which of the following best describes the synovial membrane?

Accepted Answer

The synovial membrane is a thin layer of synovial cells that lines the joint capsule and secretes synovial fluid.

Question 19

A mature mandibular condyle exhibits which characteristic?

Accepted Answer

A mature mandibular condyle is covered by a layer of bone, known as subchondral bone, instead of cartilage. Option A is incorrect because the condylar head is actually oval-shaped. Option C is also incorrect because cartilage is not present on the surface of a mature condyle. Option D is incorrect because there are no spikes of cartilage projecting into the underlying bone marrow.

Question 20

More blood vessels innervate the lateral and medial surfaces of the articular disk than the anterior and posterior areas.

Accepted Answer

The anterior and posterior areas of the articular disk have more blood vessels innervating them compared to the relatively avascular lateral and medial surfaces.

Quiz 13: Temporomandibular Joint