Textbook Question
The part of the epiphysis that does not ossify during a person's lifetime is the:
a. Articular surface
b. Secondary ossification center
c. Diaphyseal notch
d. Nutrient foramen
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Ch. 6 Bones and Bone Tissue
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology26
- Ch. 2 The Chemistry of Life38
- Ch. 3 The Cell55
- Ch. 4 Histology47
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System36
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System42
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart30
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity45
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Chapter 6, Problem 11
Long bones grow in length from the:
a. Diaphyseal line
b. Epiphyseal line
c. Epiphyseal plate
d. Medullary cavity
Verified step by step guidance1
Understand the anatomy of a long bone: A long bone consists of the diaphysis (shaft), epiphyses (ends), and other structures like the epiphyseal plate, epiphyseal line, and medullary cavity. These structures play specific roles in bone growth and function.
Learn the role of the epiphyseal plate: The epiphyseal plate, also known as the growth plate, is a layer of hyaline cartilage located between the diaphysis and the epiphysis. It is responsible for longitudinal growth during childhood and adolescence.
Differentiate between the epiphyseal plate and the epiphyseal line: The epiphyseal plate is present in growing bones and allows for lengthening. Once growth is complete, the cartilage is replaced by bone, forming the epiphyseal line, which is a remnant of the growth plate.
Eliminate incorrect options: The diaphyseal line and medullary cavity are not involved in the lengthwise growth of bones. The medullary cavity is the hollow space within the diaphysis that contains bone marrow, while the diaphyseal line is not a recognized anatomical structure.
Conclude that the correct answer is the epiphyseal plate, as it is the structure responsible for the growth in length of long bones during development.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Long Bone Structure
Long bones consist of a diaphysis (shaft) and two epiphyses (ends). The diaphysis contains the medullary cavity, which houses bone marrow, while the epiphyses are covered with articular cartilage. Understanding this structure is essential for identifying where growth occurs.
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Gross Anatomy of Bones - Structure of a Long Bone Example 1
Epiphyseal Plate
The epiphyseal plate, also known as the growth plate, is a layer of cartilage located between the epiphysis and diaphysis in growing bones. It is responsible for the lengthwise growth of long bones, as new cartilage is produced and gradually ossified into bone, allowing for growth until skeletal maturity.
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Bone Growth Mechanisms
Bone growth occurs through two primary processes: endochondral ossification and intramembranous ossification. In long bones, endochondral ossification is the key mechanism, where cartilage is replaced by bone tissue, particularly at the epiphyseal plate, facilitating lengthening during development.
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Related Practice
Textbook Question
Explain the effect that the following hormones have on growth of bone tissue:
b. Testosterone
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Textbook Question
Correctly order the following steps of bone growth in length by placing a 1 by the first step, a 2 by the second step, and so on.
Calcified cartilage is replaced with bone in the zone of ossification.
Chondrocytes in the zone of proliferation divide by mitosis.
Chondrocytes enter the zone of calcification and die as their matrix calcifies.
Chondrocytes enlarge and cease dividing.
Textbook Question
What is the difference between a primary and secondary ossification center in a long bone?
Textbook Question
Explain the effect that the following hormones have on the growth of bone tissue:
a. Growth hormone
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Textbook Question
Of the following statements, identify those that are properties of intramembranous ossification, endochondral ossification, or both.
a. The bone is formed via a hyaline cartilage model.
b. Bone tissue forms from ossification centers.
c. Bone forms from within a mesenchyme membrane.
d. The early spongy bone is formed, after which the early compact bone develops.
e. The original primary bone is replaced with secondary bone.
f. A bone collar forms, followed by the early spongy bone.
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