Textbook Question
Describe the roles of the following components of the ECM:
Collagen fibers
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Ch. 4 Histology
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology24
- Ch. 2 The Chemistry of Life37
- Ch. 3 The Cell54
- Ch. 4 Histology46
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System35
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System41
- 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 Heart28
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity41
- 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
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814Not the one you use?Change textbook
Chapter 4, Problem L3.A2
In the disease scleroderma, excessive collagen, glycosaminoglycans, and glycoproteins are produced and deposited in tissues throughout the body. Predict the effects of this disease.
Verified step by step guidance1
Understand the role of collagen, glycosaminoglycans, and glycoproteins in normal tissue function. Collagen provides structural support, glycosaminoglycans contribute to hydration and elasticity, and glycoproteins are involved in cell signaling and adhesion.
Recognize that excessive production and deposition of these substances can lead to abnormal tissue remodeling. This may result in thickening and hardening of tissues, a hallmark of scleroderma.
Consider the impact on organ systems. For example, excessive collagen in the skin can cause tightness and reduced flexibility, while deposition in the lungs or heart can impair their function.
Analyze how these changes affect physiological processes. For instance, reduced elasticity in blood vessels due to collagen deposition can lead to hypertension and impaired circulation.
Predict systemic effects based on the widespread nature of the disease. This may include reduced mobility, difficulty breathing, and complications in organ systems such as the gastrointestinal tract, kidneys, and cardiovascular system.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Scleroderma
Scleroderma is an autoimmune disease characterized by the hardening and tightening of the skin and connective tissues. It results from an overproduction of collagen and other extracellular matrix components, leading to fibrosis. This condition can affect various organs, causing symptoms that range from skin changes to serious complications in the lungs, heart, and digestive system.
Collagen
Collagen is a primary structural protein found in connective tissues, providing strength and support to skin, bones, and organs. In scleroderma, excessive collagen production leads to tissue stiffness and loss of elasticity, which can impair organ function and mobility. Understanding collagen's role is crucial for predicting the physical manifestations of the disease.
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Fibrosis
Fibrosis is the formation of excess fibrous connective tissue in an organ or tissue, often as a reparative response to injury or inflammation. In scleroderma, fibrosis occurs due to the accumulation of collagen and other matrix components, resulting in scarring and dysfunction of affected organs. This process can lead to significant health issues, including reduced lung capacity and impaired circulation.
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Explain why it would be difficult for a mature multinucleate cell such as a skeletal muscle fiber to divide by mitosis.
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Imagine that a disease turns the simple epithelia of the lungs, kidney tubules, and intestines into keratinized stratified squamous epithelia. What effect would this change in form have on the functions of these tissues?
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In the disease pulmonary fibrosis, elastic fibers of the lung are destroyed and replaced with collagen fibers. Predict the effect this would have on breathing.
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Epithelial cells of the kidneys have pumps that drive the transcellular transport of sodium ions.
Is this epithelium likely to be simple or stratified? Why?
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Textbook Question
Predict which organelles are likely to be abundant in cells such as fibroblasts that actively produce and secrete proteins.
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