$$\text{Degrees of freedom} = 3$$

$$\text{Mobility} \propto \frac{1}{\text{Stability}}$$

Question 1

Which of the following best describes a synostosis (bony joint)?

Accepted Answer

A joint where two bones are fused together by ossification, resulting in no movement.

Question 2

Which joint type is most likely to develop painful dysfunction and is most important for physical therapists and athletic coaches?

Accepted Answer

Synovial joints

Question 3

A patient presents with limited movement in the joint between the tibia and fibula. Which type of fibrous joint is this?

Accepted Answer

Syndesmosis

Question 4

Which of the following is a correct example of a synchondrosis?

Accepted Answer

The epiphyseal plate in a growing long bone

Question 5

Which structure in a synovial joint is responsible for secreting synovial fluid and removing debris?

Accepted Answer

Inner synovial membrane

Question 6

Which of the following joint types allows movement in three planes and is classified as multiaxial?

Accepted Answer

Ball-and-socket joint

Question 7

A dentist is examining the attachment of a tooth to the jawbone. Which type of joint is this?

Accepted Answer

Gomphosis

Question 8

Which accessory structure of synovial joints helps tendons slide more easily and cushions muscles?

Accepted Answer

Bursa

Question 9

Which movement describes turning the palm upward, as in anatomical position?

Accepted Answer

Supination

Question 10

If a person stands on tiptoe, which special movement of the foot is occurring?

Accepted Answer

Plantar flexion

Question 11

Which equation best represents the degrees of freedom for a triaxial joint?

Accepted Answer

$$	ext{Degrees of freedom} = 3$$

Question 12

Which joint action involves movement in the frontal plane away from the midline?

Accepted Answer

Abduction

Question 13

A football player suffers a meniscus tear in his knee. What is the primary function of the meniscus in this joint?

Accepted Answer

Absorbs shock and stabilizes the joint

Question 14

Which of the following is a biaxial synovial joint?

Accepted Answer

Radiocarpal joint

Question 15

During chewing, the mandible moves anteriorly and posteriorly. Which joint actions are these?

Accepted Answer

Protraction and retraction

Question 16

Which formula correctly describes the relationship between joint mobility and stability?

Accepted Answer

$$	ext{Mobility} \propto \frac{1}{	ext{Stability}}$$

Question 17

Which joint is an example of a saddle joint?

Accepted Answer

Base of the thumb (first carpometacarpal joint)

Question 18

A gymnast performs a split, moving her legs away from the midline. Which joint action is primarily involved?

Accepted Answer

Abduction

Question 19

Which joint type is characterized by flat articular surfaces and allows bones to slide over each other?

Accepted Answer

Plane (gliding) joint

Question 20

A patient is unable to rotate their forearm so the palm faces downward. Which movement is impaired?

Accepted Answer

Pronation

Comprehensive Study Notes on Joints: Structure, Classification, and Movements

Guida di studio - Domande di pratica