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Ch. 6 Bones and Bone Structure
Martini - Fundamentals of Anatomy & Physiology 11th Edition
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Not the one you use?Change textbook
All textbooksMartini, Nath, Bartholomew 11th EditionCh. 6 Bones and Bone StructureProblem 8
Chapter 6, Problem 8

The presence of an epiphyseal line indicates:
(a) Epiphyseal growth has ended
(b) Epiphyseal growth is just beginning
(c) Growth of bone diameter is just beginning
(d) The bone is fractured at the location
(e) No particular event

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1
Understand that the epiphyseal line is a remnant of the epiphyseal plate, which is a region of cartilage found in growing bones.
Recall that the epiphyseal plate is responsible for longitudinal bone growth during childhood and adolescence.
Recognize that when the epiphyseal plate ossifies and becomes the epiphyseal line, it indicates that the bone has stopped growing in length.
Eliminate options that suggest growth is beginning or that the line indicates a fracture, as these do not align with the biological role of the epiphyseal line.
Conclude that the presence of an epiphyseal line means that epiphyseal growth has ended.

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Key Concepts

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

Epiphyseal Plate and Line

The epiphyseal plate, or growth plate, is a layer of cartilage found in growing bones where new bone tissue forms, allowing lengthwise growth. When growth ceases, this cartilage is replaced by bone, forming the epiphyseal line, which indicates that the bone has reached its adult length.
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Bone Growth in Length vs. Diameter

Bone growth in length occurs at the epiphyseal plates through endochondral ossification, while growth in diameter (appositional growth) happens at the bone's surface. The epiphyseal line specifically relates to lengthwise growth cessation, not diameter growth.
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Bone Fractures and Anatomical Markers

A bone fracture is a break or crack in the bone, which is a pathological condition, not a normal anatomical feature. The epiphyseal line is a normal anatomical marker indicating growth completion, not a sign of fracture.
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Related Practice
Textbook Question

Classify the bones in the following diagram according to their shape.

e. _____

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Textbook Question

Classify the bones in the following diagram according to their shape.

d. _____

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Textbook Question

Classify the bones in the following diagram according to their shape.

f. _____

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Textbook Question

The primary reason that osteoporosis accelerates after menopause in women is:

(a) Reduced levels of circulating estrogens

(b) Reduced levels of vitamin C

(c) Diminished osteoclast activity

(d) Increased osteoblast activity

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Textbook Question

Name the major functions of the skeletal system.

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Textbook Question

The nonpathologic loss of bone that occurs with aging is called:

(a) Osteomyelitis

(b) Osteoporosis

(c) Osteopenia

(d) Osteitis

(e) Osteomalacia

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