Domanda del libro di testo
The disorder in which bones are porous and thin but bone composition is normal is
a. Osteomalacia
b. Osteoporosis
c. Paget's disease
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Ch. 6 Bones and Skeletal Tissues
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034
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TOC.tableOfContents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units21
- Ch. 4 Tissue: The Living Fabric20
- Ch. 5 The Integumentary System11
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue19
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity32
- Ch. 14 The Autonomic Nervous System19
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System23
- Ch. 17 Blood25
- Ch. 18 The Cardiovascular System: The Heart24
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues14
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Non è quello che usi tu?Cambia libro di testo
Capitolo 6, Problema 12
Osteocytes residing in lacunae of osteons of healthy compact bone are located quite a distance from the blood vessels in the central canals, yet they are well nourished. How can this be explained?
Guida verificata passo dopo passo1
Understand the structure of compact bone, focusing on osteons, which are cylindrical units containing a central canal with blood vessels surrounded by concentric lamellae of bone matrix.
Recognize that osteocytes reside in small spaces called lacunae, which are located between the lamellae and are not directly adjacent to blood vessels.
Identify the presence of tiny channels called canaliculi that radiate from each lacuna and connect osteocytes to each other and to the central canal.
Explain that through these canaliculi, osteocytes extend cytoplasmic processes that allow the exchange of nutrients, oxygen, and waste products by diffusion from the blood vessels in the central canal.
Conclude that this network of canaliculi enables osteocytes to remain well nourished despite their distance from the blood vessels, maintaining bone health and function.
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Structure of Osteons
Osteons are the fundamental functional units of compact bone, consisting of concentric lamellae surrounding a central canal that contains blood vessels. Osteocytes reside in small spaces called lacunae between the lamellae, which are interconnected by tiny channels called canaliculi.
Video consigliato:
5:39
Osteon
Role of Canaliculi in Nutrient Transport
Canaliculi are microscopic canals that connect lacunae to each other and to the central canal. They allow the exchange of nutrients, oxygen, and waste products between osteocytes and blood vessels, enabling cells far from the central canal to remain nourished despite the distance.
Video consigliato:
Percorso guidato
02:37Active Transport
Cellular Communication and Bone Maintenance
Osteocytes communicate through their cytoplasmic extensions within canaliculi, facilitating the transfer of signals and nutrients. This network supports bone maintenance and remodeling by ensuring that even distant osteocytes receive essential substances from the blood supply.
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Percorso guidato
2:59Map of the Lesson on Cell Communication
Pratica correlata
Domanda del libro di testo
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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Domanda del libro di testo
(a) During what period of life does skeletal mass increase dramatically? Begin to decline?
(b) Why are fractures most common in elderly individuals?
(c) Why are greenstick fractures most common in children?
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Domanda del libro di testo
Describe the process of new bone formation in an adult bone. Use the terms "osteoid seam" and "calcification front" in your discussion.
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Domanda del libro di testo
Describe in proper sequence the events of endochondral ossification in a long bone.
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Domanda del libro di testo
As we grow, our long bones increase in diameter, but the thickness of the compact bone of the shaft remains relatively constant. Explain this phenomenon.
1026
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