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Ch. 6 Bones and Skeletal Tissues
Hoehn - Marieb Human Anatomy & Physiology, 12th edition
Hoehn, Haynes, Abbott12th EditionMarieb Human Anatomy & PhysiologyISBN: 9780138242732Not the one you use?Change textbook
All textbooksHoehn, Haynes, Abbott 12th EditionCh. 6 Bones and Skeletal TissuesProblem 7
Chapter 6, Problem 7

Formation of the bony callus in fracture repair is followed by:
a. Hematoma formation
b. Fibrocartilaginous callus formation
c. Bone remodeling
d. Formation of granulation tissue

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1
Step 1: Understand the sequence of events in fracture repair. The process begins with hematoma formation, where blood clots form at the fracture site to stop bleeding and provide a foundation for healing.
Step 2: Next, fibrocartilaginous callus formation occurs, where a soft callus made of collagen and cartilage bridges the broken bone ends, stabilizing the fracture.
Step 3: After the soft callus, the bony callus forms. This is a hard callus made of spongy bone that replaces the fibrocartilaginous callus, providing stronger support.
Step 4: The step that follows the formation of the bony callus is bone remodeling. During remodeling, the spongy bone is gradually replaced by compact bone, restoring the bone's original shape and strength.
Step 5: Therefore, the correct answer is the process that comes after the bony callus formation, which is bone remodeling.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Stages of Fracture Healing

Fracture healing occurs in a series of stages: hematoma formation, fibrocartilaginous callus formation, bony callus formation, and bone remodeling. Understanding the sequence helps identify what follows each stage during bone repair.
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Bony Callus Formation

The bony callus forms when osteoblasts replace the fibrocartilaginous callus with spongy bone, stabilizing the fracture. This stage bridges the broken bone ends and precedes the remodeling phase.
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Bone Remodeling

Bone remodeling is the final phase where the bony callus is reshaped into compact bone, restoring the bone's original structure and strength. This process can take several months to complete.
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Related Practice
Textbook Question

The disorder in which bones are porous and thin but bone composition is normal is

a. Osteomalacia

b. Osteoporosis

c. Paget's disease

Textbook Question

A bone with approximately the same width, length, and height is most likely:

a. A long bone

b. A short bone

c. A flat bone

d. An irregular bone

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Textbook Question

The organic portion of matrix is important in providing all but

a. Tensile strength

b. Hardness

c. Ability to resist stretch

d. Flexibility

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Textbook Question

Wolff's law is concerned with:

a. Calcium homeostasis of the blood

b. The shape of a bone being determined by mechanical stresses placed on it

c. The electrical charge on bone surfaces

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Textbook Question

Bone remodeling in adults is regulated and directed mainly by:

a. Growth hormone

b. Thyroid hormones

c. Sex hormones

d. Mechanical stress

e. PTH

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Textbook Question

Describe in proper sequence the events of endochondral ossification in a long bone.

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