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?
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 L2.3
Predict what would happen if the mucous membranes of the body stopped secreting mucus or if they secreted excess mucus.
Verified step by step guidance1
Understand the role of mucous membranes: Mucous membranes line various body cavities and organs, such as the respiratory, digestive, and urogenital tracts. They secrete mucus, which serves to protect and lubricate these surfaces, trap pathogens, and prevent tissue dehydration.
Analyze the consequences of no mucus secretion: If mucous membranes stopped secreting mucus, the affected areas would lose their protective barrier. This could lead to increased vulnerability to infections, tissue damage due to dryness, and impaired function of systems like the respiratory tract (difficulty trapping dust and pathogens) and digestive tract (reduced lubrication for food passage).
Examine the effects of excess mucus secretion: Overproduction of mucus could result in blockages or obstructions in the respiratory or digestive tracts. For example, in the respiratory system, excess mucus could impair airflow, leading to difficulty breathing or conditions like chronic bronchitis. In the digestive system, it could interfere with nutrient absorption.
Consider the physiological mechanisms involved: Mucus secretion is regulated by various factors, including neural signals, immune responses, and environmental stimuli. Disruption in these regulatory mechanisms could lead to either insufficient or excessive mucus production.
Relate to clinical conditions: Insufficient mucus secretion is seen in conditions like Sjögren's syndrome, where dryness affects mucous membranes. Excess mucus production is common in diseases like cystic fibrosis or chronic obstructive pulmonary disease (COPD). Understanding these conditions can help predict the broader implications of altered mucus secretion.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Mucous Membranes
Mucous membranes are specialized tissues that line various cavities and organs in the body, producing mucus. This mucus serves several functions, including lubrication, protection against pathogens, and trapping particles. Understanding the role of mucous membranes is crucial for predicting the effects of changes in mucus secretion.
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Mucous Membranes
Mucus Function
Mucus plays a vital role in maintaining homeostasis by providing a barrier against infections, facilitating the movement of materials, and keeping tissues moist. If mucus secretion is disrupted, either by cessation or excess, it can lead to various health issues, such as increased susceptibility to infections or impaired organ function.
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Homeostasis
Homeostasis refers to the body's ability to maintain stable internal conditions despite external changes. The secretion of mucus is part of this regulatory process, helping to protect and support various bodily functions. Disruptions in mucus production can lead to imbalances, affecting overall health and physiological processes.
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Related Practice
Textbook Question
If you were to cut through epithelial tissue without penetrating the basement membrane, would you expect bleeding to occur? Why or why not?
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Textbook Question
State whether each of the following describes epithelial, connective, muscle, or nervous tissue.
a. ____ECM is often the primary element.
b. ____Consists of excitable cells that are specialized for contraction.
c. ____Sheets of tightly packed cells with little ECM.
d. ____Makes up the majority of the brain and spinal cord.
e. ____Cells may be smooth or striated.
f. ____Binds, connects, supports, and transports substances throughout the body.
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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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Textbook Question
Explain how connective tissues differ from epithelial tissues in structure and function.