Textbook Question
Predict what would happen if the mucous membranes of the body stopped secreting mucus or if they secreted excess mucus.
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Ch. 4 Histology
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 4, Problem L2.1
If you were to cut through epithelial tissue without penetrating the basement membrane, would you expect bleeding to occur? Why or why not?
Verified step by step guidance1
Understand the structure of epithelial tissue: Epithelial tissue is composed of tightly packed cells that form a protective layer. It is avascular, meaning it does not contain blood vessels, and is supported by an underlying basement membrane.
Recognize the role of the basement membrane: The basement membrane separates the epithelial tissue from the connective tissue beneath it. Blood vessels are located in the connective tissue, not within the epithelial layer itself.
Analyze the scenario: If you cut through the epithelial tissue without penetrating the basement membrane, you are only affecting the avascular epithelial layer and not reaching the blood vessels in the connective tissue.
Conclude whether bleeding would occur: Since blood vessels are absent in the epithelial tissue and are located below the basement membrane, cutting through the epithelial tissue alone would not result in bleeding.
Summarize the reasoning: Bleeding requires damage to blood vessels, which are located in the connective tissue beneath the basement membrane. Therefore, as long as the basement membrane remains intact, bleeding will not occur.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Epithelial Tissue Structure
Epithelial tissue is composed of closely packed cells that form protective layers on body surfaces and cavities. It is characterized by its polarity, with an apical surface facing the external environment and a basal surface attached to the basement membrane. This structure allows epithelial tissue to serve various functions, including protection, absorption, and secretion.
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02:41
Structural Naming of Epithelial Tissue Example 1
Basement Membrane
The basement membrane is a thin, fibrous layer that separates epithelial tissue from underlying connective tissue. It provides structural support and acts as a barrier to regulate the movement of substances between the epithelium and the underlying tissues. Importantly, it is avascular, meaning it does not contain blood vessels, which is crucial for understanding why cutting through epithelial tissue without penetrating this layer would not cause bleeding.
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06:01Characteristic 2: Tightly Pressed Tissue Anchored to Basement Membrane
Vascularization and Bleeding
Bleeding occurs when blood vessels are damaged, allowing blood to escape into surrounding tissues. Epithelial tissues are generally avascular, relying on diffusion from nearby blood vessels in the connective tissue for nutrients and waste removal. Since the basement membrane separates the epithelium from the vascularized connective tissue, cutting through the epithelium without breaching the basement membrane would not damage blood vessels, thus preventing bleeding.
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6:55Vascular Layer
Related Practice
Textbook Question
Certain types of cancerous lung tumors can secrete hormones normally made by the pancreas, adrenal gland, and hypothalamus. What prevents such secretion from happening in healthy cells?
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Textbook Question
Why do you think the rate of cell division is different for different tissues? Where in the body would you expect to find cells that have a rapid rate of division? Where might you find cells that have a slow rate of division? Explain.
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Textbook Question
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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Textbook Question
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
Vitamin C is required for the synthesis of collagen. Predict the effect that a vitamin C deficiency (a disease called scurvy) would have on bone tissue, dense regular collagenous connective tissue, dense irregular connective tissue, and cartilage. What symptoms would you expect to see from this disease?
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