Textbook Question
The vitamins essential for normal adult bone maintenance and repair are:
(a) A and E
(b) C and D3
(c) B and E
(d) B complex and K
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Ch. 6 Bones and Bone Structure
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology25
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization29
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure33
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses15
- Ch. 18 The Endocrine System21
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation26
- Ch. 22 The Lymphatic System and Immunity25
- Ch. 23 The Respiratory System4
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes30
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance17
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011Not the one you use?Change textbook
Chapter 6, Problem 2
Two-thirds of the weight of bone is accounted for by:
(a) Crystals of calcium phosphate
(b) Collagen fibers
(c) Osteocytes
(d) Calcium carbonate
Verified step by step guidance1
Understand that bone tissue is composed of both organic and inorganic components, which contribute to its strength and structure.
Recall that the inorganic portion of bone, which makes up about two-thirds of its weight, primarily consists of mineral crystals.
Identify the main mineral crystals in bone, which are primarily crystals of calcium phosphate in the form of hydroxyapatite.
Recognize that collagen fibers are the organic component providing flexibility, but they account for about one-third of bone weight, not two-thirds.
Conclude that the two-thirds of bone weight is mainly due to crystals of calcium phosphate, making option (a) the correct choice.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Bone Composition
Bone is a composite material made up of organic and inorganic components. The inorganic part mainly consists of mineral crystals, which provide hardness and strength, while the organic part, primarily collagen fibers, offers flexibility and resilience.
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Bone Marrow
Calcium Phosphate Crystals
Calcium phosphate, mainly in the form of hydroxyapatite crystals, is the primary mineral component of bone. These crystals make up about two-thirds of the bone's weight and are responsible for its rigidity and load-bearing capacity.
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Collagen Fibers in Bone
Collagen fibers are the main organic component of bone, providing a flexible framework that supports mineral deposition. They contribute to bone's tensile strength and help prevent brittleness.
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Related Practice
Textbook Question
The basic functional unit of compact bone is the Haversian system or:
(a) Osteocyte
(b) Osteoclast
(c) Osteon
(d) Osseous matrix
(e) Osseous lamellae
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Textbook Question
The membrane found wrapping the bones, except within the joint cavity, is the:
(a) Periosteum
(b) Endosteum
(c) Perforating fibers
(d) A, b, and c are correct
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Textbook Question
Blood cell formation occurs in:
(a) Yellow bone marrow
(b) Red bone marrow
(c) The matrix of bone tissue
(d) The ground substance of bones
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