OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

What is defined as when a bone slips out of its joint?

1. Fracture

2. Dislocation

3. Sprain

4. Subluxation

The correct answer is: Dislocation

Dislocation is defined as the condition where a bone slips out of its joint, resulting in a misalignment of the bone within the joint space. This condition often occurs due to trauma or excessive force, which can cause significant pain, swelling, and an inability to move the affected joint. When a dislocation occurs, the ligaments and surrounding tissues can also be damaged, leading to complications if not properly treated. In contrast, a fracture refers to a break in the bone itself; a sprain involves the stretching or tearing of ligaments connecting bones at a joint; and subluxation is a partial dislocation where the bone is temporarily out of place but can still return to its proper position without intervention. Understanding these distinctions is essential for accurately identifying and treating various joint and bone injuries.