Certified Electronic Health Records Specialist (CEHRS) Practice Exam

What is the key characteristic of a joint classified as a synarthrosis?

1. Slightly movable

2. Freely movable

3. Immovable

4. Partially movable

The correct answer is: Immovable

A joint classified as a synarthrosis is characterized by being immovable. Synarthroses are the types of joints where the bones are closely connected by fibrous tissue, which allows little to no movement. This type of joint primarily serves to provide stability and strength, often found in areas of the body that need to protect underlying structures. Examples of synarthrotic joints include the sutures in the skull, where the edges of the bone fit tightly together. In contrast, the other classifications of joints, such as slightly movable, freely movable, or partially movable, indicate varying degrees of motion between the bones, which are not applicable to synarthroses. Thus, the defining feature of synarthroses is their immobility, making option C the correct choice.