The Question is from neet-zoology locomotion-and-movement , and it was created by the author T SAILAJA

Question

Which of the following accurately describes the role of the periosteum in fracture repair?

T SAILAJA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Bone fracture repair and the role of the periosteum.
 **Related Topics**: Osteoblasts, chondroblasts, callus formation, bone remodeling.
 **Prerequisites**: Understanding of bone structure, cell types involved in bone formation and repair.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the periosteum's role in fracture repair.
  Options describe different potential roles.
**Method & Steps**:
 1. Analyze each option to determine its accuracy regarding the periosteum's function in fracture healing.
  Reasoning: The periosteum is a membrane covering the outer surface of bones. It contains osteoprogenitor cells, which can differentiate into osteoblasts and chondroblasts.
 2. Identify the option that correctly describes the periosteum's contribution to callus formation.
  Working: Option B states that the periosteum provides cells that differentiate into osteoblasts and chondroblasts, contributing to callus formation. This is accurate.  A callus is a mass of tissue that forms around a fracture site, initially composed of cartilage and then replaced by bone.
  Key Point: Osteoblasts produce bone matrix, and chondroblasts produce cartilage, both crucial in the early stages of fracture healing.
 3. Eliminate incorrect options.
  Result: Option B is the correct answer.
  Verification: The other options are incorrect; the periosteum does not secrete synovial fluid, absorb calcium from the blood to promote hardening, or stimulate osteoclast activity directly in the way described.
 ## OPTION ANALYSIS
A :x: Secretes synovial fluid to lubricate the fracture site.  Synovial fluid is found in joints, not related to periosteal function in fracture repair.
B ✓: Provides cells that differentiate into osteoblasts and chondroblasts, contributing to callus formation. This accurately reflects the periosteum's role in supplying cells for bone and cartilage formation during fracture healing.
C :x: Absorbs excess calcium from the blood to promote bone hardening.  This process is more related to the overall calcium homeostasis in the body, not the direct function of the periosteum in fracture repair.
D :x: Stimulates osteoclast activity to remove damaged bone fragments.  While osteoclasts are involved in bone remodeling during fracture repair, their activity is not directly stimulated by the periosteum in the manner described.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the periosteum's role with that of other tissues like the endosteum or bone marrow.
  How to avoid: Understand the distinct functions of each tissue in bone structure and repair.
  2.Overlooking the importance of osteoprogenitor cells within the periosteum.
  How to avoid: Focus on the cellular components of the periosteum and their role in differentiation and bone formation.
 **Quick Tips**:
  1.Remember the periosteum's rich supply of osteoprogenitor cells is key to its role in fracture healing.
  2.Visualize the formation of the callus and the contributions of osteoblasts and chondroblasts.

T SAILAJA · Answer

Secretes synovial fluid to lubricate the fracture site

T SAILAJA · Answer

The correct Option is "Provides cells that differentiate into osteoblasts and chondroblasts, contributing to callus formation"

T SAILAJA · Answer

Absorbs excess calcium from the blood to promote bone hardening

T SAILAJA · Answer

Stimulates osteoclast activity to remove damaged bone fragments

NEET Zoology Locomotion And Movement MCQs

Select Topic

Question Tags

NEET Subjects

Our Bots

Company