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

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

Question 1

Which of the following best describes a synovial joint?

Accepted Answer

A joint where bones are separated by a fluid-filled cavity and surrounded by an articular capsule.

Question 2

Which movement is described by the equation $$	ext{Abduction} = 	ext{Movement away from the midline}$$?

Accepted Answer

Moving the arm away from the body’s midline.

Question 3

A patient presents with swelling and pain in the knee after a twisting injury. MRI reveals a tear in the meniscus. Which type of joint is affected?

Accepted Answer

Synovial joint

Question 4

Which of the following is a distinguishing feature of synovial joints?

Accepted Answer

Presence of a joint cavity filled with synovial fluid

Question 5

Which equation best represents the relationship between the stability of a synovial joint and the number of ligaments?

Accepted Answer

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

Question 6

Which of the following movements occurs at the shoulder joint and is described by $$	ext{Circumduction}$$?

Accepted Answer

Moving the arm in a circle so that it describes a cone in the air

Question 7

A patient is diagnosed with rheumatoid arthritis. Which of the following best describes this condition?

Accepted Answer

An autoimmune inflammatory disorder affecting the joints

Question 8

Which of the following best explains why cartilage tears are difficult to heal?

Accepted Answer

Cartilage lacks a direct blood supply, limiting its ability to repair.

Question 9

Which joint type allows only flexion and extension, as described by $$	ext{Hinge joint: Flexion/Extension}$$?

Accepted Answer

Hinge joint

Question 10

A football player suffers a sprain in the ankle. Which structure is most likely damaged?

Accepted Answer

Ligament

Question 11

Which of the following is true regarding bursitis?

Accepted Answer

It is inflammation of the bursa, often caused by friction or a blow.

Question 12

Which equation best represents the relationship between joint mobility and stability?

Accepted Answer

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

Question 13

Which of the following best describes the function of synovial fluid?

Accepted Answer

It lubricates the joint and nourishes the articular cartilage.

Question 14

Which joint is most likely to be affected by gouty arthritis?

Accepted Answer

Big toe joint

Question 15

Which of the following movements is described by $$	ext{Pronation}$$?

Accepted Answer

Turning the palm so it faces posteriorly or downward

Question 16

A patient is unable to flex their elbow after an injury. Which muscle is most likely affected?

Accepted Answer

Biceps brachii

Question 17

Which of the following is a function of articular cartilage in synovial joints?

Accepted Answer

It reduces friction and absorbs shock.

Question 18

Which joint is classified as a ball-and-socket joint?

Accepted Answer

Shoulder joint

Question 19

Which of the following best describes Lyme disease in relation to joints?

Accepted Answer

An inflammatory condition caused by a spirochete bacterium transmitted by ticks

Question 20

Which equation best represents the effect of increased synovial fluid viscosity on joint movement?

Accepted Answer

$$	ext{Joint movement} \propto \frac{1}{	ext{Viscosity}}$$

Anatomy & Physiology: Structure and Function of Joints

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