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Questions and Answers
Which type of fluid has a low specific gravity and does not contain inflammatory cells?
What is responsible for the coagulation on standing of one of the fluid types?
Which process allows leukocytes to marginate along the endothelium of blood vessels during inflammation?
What is the main function of neutrophils during inflammation?
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What marks the difference in the timing of occurrence between transudate and exudate in inflammation?
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What is a characteristic that distinguishes exudate from transudate in terms of protein content?
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What is the first response in the vascular phase of acute inflammation?
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What causes the redness and heat associated with inflammation?
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What results in swelling during acute inflammation?
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What occurs next after vasoconstriction in the vascular phase?
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What is the result of endothelial cells contracting and opening up their intercellular junctions?
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Why does severe injury result in instant leakage of vascular structures?
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What is the role of lymphocytes in the immune response?
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What is the main function of eosinophils?
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Which type of inflammation is characterized by a quick and severe response?
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What is the cause of chronic inflammation?
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Which immune cells are involved in the first defense against pyrogenic bacteria?
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What is the function of chemical mediators of inflammation like histamine and cytokines?
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What is the characteristic of catarrhal inflammation in mucous membranes?
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Which of the following is a common cause of catarrh?
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What can lead to excessive mucus production in response to environmental irritants?
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Which of the following foods can potentially trigger catarrhal inflammation in some individuals?
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How does catarrhal inflammation differ from fibrinous exudates?
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Which environmental factor can contribute to increased mucus production in response to irritants?
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What is the main difference between non-necrotizing granulomas and necrotizing granulomas?
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Which disease is characterized by granulomas affecting the lymph nodes and lungs, among other organs?
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What is the most common bacterium responsible for lymphangitis?
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Which risk factor is positively correlated with elevated levels of inflammatory indicators?
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What type of granuloma is caused by particular silicates introduced into the tissue after a latent period?
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Which inflammatory disease affects the terminal ileum and colon?
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Study Notes
Types of Granulomas
- Non-necrotizing granulomas consist entirely of immune cells
- Necrotizing granulomas contain dead cells at their center and are often seen in tuberculosis
Conditions Associated with Granulomas
- Sarcoidosis: a rare inflammatory disease affecting the lymph nodes and lungs
- 'Talc' granuloma: an inflammatory reaction caused by silicates introduced into the tissue
- Crohn's disease: a chronic inflammatory disease affecting the terminal ileum and colon
- Lymph nodes draining ulcerative areas with lipid breakdown
- Lymphangitis: infection of the lymphatic vessels of the skin, often caused by Streptococcus pyogenes
Characteristics of Transudate and Exudate
- Transudate: clear fluid with low protein content, low specific gravity, and no inflammatory cells
- Exudate: turbid fluid with high protein content, high specific gravity, and contains inflammatory cells
Acute Inflammation
- Cellular component: engorgement and stasis of leukocytes, followed by margination and endothelial adhesion
- Next phase: leukocytes migrate out of vessels through diapedesis, driven by chemical mediators and chemotaxis
- Phagocytosis: leukocytes remove or eliminate injurious stimuli, release enzymes and toxic substances, and release growth factors for healing
Vascular Phase of Acute Inflammation
- Vasoconstriction reduces blood flow, followed by vasodilation, increasing blood flow and permeability
- Increased permeability leads to transudate and exudate formation, causing swelling
Cellular Phase of Acute Inflammation
- Leukocytes migrate to the site of inflammation, with neutrophils and macrophages playing key roles
Functions of Immune Cells
- Neutrophils: remove or eliminate injurious stimuli, release enzymes and toxic substances, and release growth factors for healing
- Macrophages: clean up debris left behind by neutrophils
- Lymphocytes: fight tumor cells and viruses
- Eosinophils: attack parasites and involved in allergic responses
Chemical Mediators of Inflammation
- Histamine, cytokines, and other chemical mediators play a role in vasoconstriction, vasodilation, modulation of vascular permeability, activation of inflammatory cells, chemotaxis, microbial killing, degradation of tissue, pain, and fever
Chronic Inflammation
- Lasts for prolonged periods of several months to years
- Caused by failure to eliminate the agent causing acute inflammation, such as infectious organisms
- Can result from various etiologies, including Mycobacterium tuberculosis, Protozoa, Fungi, and other parasites
Fibrinous Exudates
- Characterized by thick, yellow exudate coating the peritoneal surfaces
- Often seen in conditions such as peritonitis
Catarrhal Inflammation
- An inflammatory process that occurs in mucous membranes
- Characterized by increased blood flow, edema, enlargement of secretory epithelial cells, and profuse discharge of mucus and epithelial debris
- Caused by immune system reaction to infection or irritation, allergies, or certain food allergens
Food Allergies and Catarrhal Inflammation
- Certain foods, such as eggs, milk, soy, fish, shellfish, wheat, peanuts, and tree nuts, can cause catarrhal inflammation in some individuals
- Pollution and exposure to smoke can also cause excessive mucus production
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Description
Test your knowledge on the different phases of acute inflammation, focusing on the vascular phase and cellular phase. Learn about vasoconstriction, vasodilation, platelet aggregation, and more.
