Q: Which of the following equations best represents the relationship between joint stability and the number of ligaments present?

$$ Stability \propto \text{Number of Ligaments} $$

Question 1

Which of the following best describes a synarthrotic joint, and which is a real-life example?

Accepted Answer

An immovable joint; the suture between skull bones

Question 2

A patient presents with a torn ligament in the knee. Which of the following statements about ligament healing is correct?

Accepted Answer

Completely torn ligaments often require surgical repair because they are poorly vascularized

Question 3

Which structural joint type is characterized by a joint cavity and allows for the greatest range of movement?

Accepted Answer

Synovial joint

Question 4

A dentist is explaining why a tooth does not move in its socket under normal conditions. Which joint type and functional classification is being described?

Accepted Answer

Gomphosis; synarthrotic

Question 5

Which of the following best explains why the shoulder joint is more prone to dislocation than the hip joint?

Accepted Answer

The shoulder joint sacrifices stability for greater mobility due to its shallow socket

Question 6

Which of the following movements is an example of abduction?

Accepted Answer

Moving the arm laterally away from the midline of the body

Question 7

A football player suffers a meniscus tear in the knee. Why is this injury slow to heal?

Accepted Answer

The meniscus is avascular, so it does not repair itself efficiently

Question 8

Which of the following best describes the movement allowed by a hinge joint, and what is a real-life example?

Accepted Answer

Movement in one plane (flexion and extension); elbow joint

Question 9

A patient with gouty arthritis is advised to avoid foods high in purines. What is the underlying reason for this dietary restriction?

Accepted Answer

Purines are converted to uric acid, which can crystallize in joints and cause inflammation

Question 10

Which of the following equations best represents the relationship between joint stability and the number of ligaments present?

Accepted Answer

$$ Stability \propto 	ext{Number of Ligaments} $$

Question 11

Which of the following is a correct pairing of joint type and the movement it allows?

Accepted Answer

Plane joint – gliding movement

Question 12

A patient is unable to perform supination of the forearm. Which bones and movement are directly involved?

Accepted Answer

Radius and ulna; rotating so the palm faces upward

Question 13

Which of the following best explains why muscle tone is important for joint stability, especially in the shoulder and knee?

Accepted Answer

Muscle tone keeps tendons taut, reinforcing the joint and preventing dislocation

Question 14

Which of the following is a correct description of a symphysis joint?

Accepted Answer

A joint where bones are united by fibrocartilage, allowing slight movement

Question 15

A patient with rheumatoid arthritis is prescribed immunosuppressants. What is the primary reason for this treatment?

Accepted Answer

To suppress the immune system's attack on joint tissues

Question 16

Which of the following best describes the movement of circumduction?

Accepted Answer

Movement that describes a cone in space, combining flexion, extension, abduction, and adduction

Question 17

Which of the following is a correct example of a uniaxial joint and its movement?

Accepted Answer

Hinge joint; movement in one plane

Question 18

A patient is unable to perform opposition with the thumb. Which joint is most likely affected?

Accepted Answer

Carpometacarpal joint of the thumb (saddle joint)

Question 19

Which of the following best explains why osteoarthritis is more common in older adults?

Accepted Answer

Cartilage is broken down and not replaced as efficiently with age

Question 20

Which of the following best describes the relationship between the structure and function of a synovial joint?

Accepted Answer

The presence of a joint cavity allows for free movement and is characteristic of diarthroses

Joints (Articulations): Structure, Function, and Classification

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