Q: Which of the following equations can be used to calculate the mechanical advantage of a lever in the human body?

$$\text{Mechanical Advantage} = \frac{\text{Effort Arm}}{\text{Resistance Arm}}$$

Question 1

Which of the following best describes the difference between a sprain and a strain?

Accepted Answer

A sprain involves overstretching or tearing of ligaments, while a strain affects tendons or muscles.

Question 2

A patient presents with a joint that is visibly out of alignment after a fall. What is the most likely diagnosis?

Accepted Answer

Dislocation

Question 3

Which of the following is a characteristic feature of osteoarthritis?

Accepted Answer

Formation of bone spurs and cartilage degeneration

Question 4

Which equation best represents the relationship between force, area, and pressure in the context of joint loading?

Accepted Answer

$$F = P 	imes A$$

Question 5

A 65-year-old patient complains of joint pain that worsens with activity and improves with rest. X-rays show narrowed joint space and osteophyte formation. What is the most likely diagnosis?

Accepted Answer

Osteoarthritis

Question 6

Which of the following is NOT a typical symptom of rheumatoid arthritis?

Accepted Answer

Bone spurs at joint margins

Question 7

In rheumatoid arthritis, which immune cells are primarily responsible for attacking the synovial membrane?

Accepted Answer

T lymphocytes

Question 8

A football player twists his ankle and experiences immediate pain and swelling. The doctor suspects a ligament injury. Which type of injury is most likely?

Accepted Answer

Sprain

Question 9

Which of the following best explains why osteoarthritis is considered a 'wear and tear' disease?

Accepted Answer

It results from chronic mechanical stress leading to cartilage breakdown.

Question 10

Which of the following is a common radiographic finding in osteoarthritis?

Accepted Answer

Joint space narrowing

Question 11

A patient with rheumatoid arthritis is at increased risk for which of the following complications due to chronic inflammation?

Accepted Answer

Joint ankylosis (fusion)

Question 12

Which of the following best describes the pathophysiology of rheumatoid arthritis?

Accepted Answer

Autoimmune inflammation of the synovial membrane leading to joint destruction

Question 13

Which of the following is a distinguishing feature of rheumatoid arthritis compared to osteoarthritis?

Accepted Answer

Presence of systemic symptoms such as fever and fatigue

Question 14

A patient presents with pain, swelling, and redness in multiple joints, and laboratory tests reveal elevated rheumatoid factor. Which diagnosis is most likely?

Accepted Answer

Rheumatoid arthritis

Question 15

Which of the following best describes a dislocation?

Accepted Answer

A bone comes out of its proper alignment within a joint

Question 16

Which of the following equations can be used to calculate the mechanical advantage of a lever in the human body?

Accepted Answer

$$	ext{Mechanical Advantage} = \frac{	ext{Effort Arm}}{	ext{Resistance Arm}}$$

Question 17

Which of the following is most likely to result from repetitive stress on a joint over many years?

Accepted Answer

Osteoarthritis

Question 18

A patient with rheumatoid arthritis develops ulnar deviation of the fingers. This is primarily due to:

Accepted Answer

Destruction of joint capsule and ligaments by chronic inflammation

Question 19

Which of the following is a common misconception about osteoarthritis?

Accepted Answer

It is caused by autoimmune destruction of the synovial membrane.

Question 20

A patient with a history of rheumatoid arthritis presents with fatigue, weight loss, and low-grade fever. Which of the following best explains these symptoms?

Accepted Answer

Systemic effects of chronic autoimmune inflammation

Joint Injuries and Arthritic Disorders: Anatomy & Physiology Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard