The expanded ends of a long bone are called?

Appeared in: AIIMS Patna NO - 2020

Explanation

Epiphyses are the expanded, rounded ends of long bones, as shown in the provided diagram.
They are primarily composed of spongy bone, which contains red bone marrow responsible for hematopoiesis (blood cell formation).
The outer surface of the epiphysis that forms a joint is covered with smooth articular cartilage, which reduces friction and absorbs shock.

Option A: A tubercle is a small, rounded bony prominence that serves as an attachment site for a muscle or ligament. It is a surface marking, not the entire end of the bone.
Option B: An epicondyle is a prominence located on or above a condyle (a rounded articular surface). Like a tubercle, it is an attachment site for muscles and ligaments, not the main expanded end of the bone.
Option C: The diaphysis is the term for the long, central shaft of a long bone. It is located between the two epiphyses.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of a long bone as background academic context rather than a clinical decision trigger.
Knowledge of bone anatomy is critical for accurately assessing and documenting fractures. A fracture's location (e.g., epiphyseal, diaphyseal) dictates its treatment and potential complications.
In pediatric nursing, injuries to the epiphyseal plate (growth plate) are a major concern. These fractures, known as Salter-Harris fractures, can lead to limb length discrepancy or angular deformity if not managed correctly.
What if the question asked for the region containing the growth plate? The correct answer would be the metaphysis, which is the area where the diaphysis and epiphysis meet.

How to Approach the Question

This is a factual recall question based on anatomical terminology.
First, identify the key descriptive terms in the question: 'expanded ends' and 'long bone'.
Mentally visualize or recall a diagram of a long bone, like the one provided.
Systematically evaluate each option against your anatomical knowledge.
Eliminate 'Diaphysis' as it refers to the shaft.
Eliminate 'Tubercle' and 'Epicondyle' as they are smaller prominences for muscle/ligament attachment, not the entire end.

Concept Tested & Keywords

QNRSXl6DJHFlcR56TtYo1y

E6 Osteology InderbirSingh 5e p. 18-20

Practise the full AIIMS Patna NO - 2020

Attempt every question from this paper in a timed mock, then review the full solution for each one.