Causes and Risk Factors of Bronchial Asthma
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Questions and Answers

Which of the following is NOT a hallmark of asthma?

  • Increased mucus secretion
  • Chronic bronchial inflammation with basophils (correct)
  • Bronchial smooth muscle cell hypertrophy and hyperreactivity
  • Intermittent, reversible airway obstruction

What is one possible explanation for the increased incidence of asthma in the Western world?

  • Decreased exposure to nonpathogenic microorganisms
  • Increased exposure to infectious organisms
  • Decreased exposure to infectious organisms (correct)
  • Increased exposure to nonpathogenic microorganisms

When do the structural changes in the bronchial wall associated with airway remodeling occur?

  • Immediately after initiation of symptoms
  • Several years before initiation of symptoms (correct)
  • Simultaneously with the recruitment of eosinophils
  • During repeated bouts of inflammation

Which of the following is a characteristic feature of asthma?

<p>Intermittent shortness of breath (C)</p> Signup and view all the answers

What is the main difference between bronchial asthma and chronic obstructive pulmonary disease (COPD)?

<p>Airway obstruction is reversible in asthma but not in COPD (D)</p> Signup and view all the answers

When are asthma symptoms often worse?

<p>At night or early in the morning (B)</p> Signup and view all the answers

How does asthma differ from chronic obstructive pulmonary disease (COPD)?

<p>Asthma is more common in children than in adults, whereas COPD affects primarily adults. (B)</p> Signup and view all the answers

What is the primary characteristic of airway obstruction in asthma?

<p>Airway obstruction is reversible with bronchodilators. (D)</p> Signup and view all the answers

How does asthma typically progress as children grow?

<p>Symptoms improve gradually over time. (A)</p> Signup and view all the answers

Which statement accurately reflects the global burden of bronchial asthma?

<p>Bronchial asthma is the most common chronic condition among children globally. (D)</p> Signup and view all the answers

Where do more than 80% of asthma-related deaths occur?

<p>Low and middle-income countries (B)</p> Signup and view all the answers

Which of the following is a characteristic feature of asthma?

<p>Bronchial inflammation (A)</p> Signup and view all the answers

What is the primary characteristic of airway obstruction in asthma?

<p>Airway hyperactivity (C)</p> Signup and view all the answers

Which of the following is NOT a potent chemoattractant and activator of eosinophils in asthma?

<p>Basophils (D)</p> Signup and view all the answers

What is one of the main characteristics of asthma related to the airways?

<p>Hyper-responsiveness to stimuli (D)</p> Signup and view all the answers

How does airflow obstruction in asthma typically respond to treatment?

<p>It improves and becomes reversible after bronchodilator therapy. (C)</p> Signup and view all the answers

Which cell types and substances are involved in the bronchial inflammation seen in asthma?

<p>T-lymphocytes, neutrophils, and cytokines (B)</p> Signup and view all the answers

What is the effect of bronchial inflammation in asthma?

<p>It leads to mucus secretion, clogging the airways. (D)</p> Signup and view all the answers

Which of the following is a hallmark of bronchial asthma?

<p>Positive family history of atopy/allergy (B)</p> Signup and view all the answers

What is the proposed link between the 'hygiene hypothesis' and asthma prevalence in developed countries?

<p>Decreased exposure to allergens (B)</p> Signup and view all the answers

Which type of hypersensitivity reaction is associated with bronchial asthma?

<p>Type 1 IgE mediated hypersensitivity (B)</p> Signup and view all the answers

Which diagnostic test is commonly used to assess allergic sensitization in individuals with bronchial asthma?

<p>Skin-prick test (D)</p> Signup and view all the answers

Which condition is often preceded by allergic rhinitis and eczema, forming the "atopic triad"?

<p>Bronchial asthma (C)</p> Signup and view all the answers

Which of the following triggers is NOT commonly associated with non-atopic asthma?

<p>Allergen sensitisation (A)</p> Signup and view all the answers

Which of the following is NOT a common trigger for bronchial asthma?

<p>Antibiotics (C)</p> Signup and view all the answers

Which diagnostic test is usually negative in individuals with non-atopic asthma?

<p>Skin-prick test (A)</p> Signup and view all the answers

Which of the following medications can potentially induce non-atopic asthma?

<p>NSAIDs (C)</p> Signup and view all the answers

What role does a sensitive IgE atopic immune response play in the "Hygiene Hypothesis"?

<p>It causes an overreaction to offending pathogens/ foreign bodies. (C)</p> Signup and view all the answers

What is the potential consequence of a 'too clean' environment on the immune system?

<p>Increased sensitivity to IgE atopic immune response (C)</p> Signup and view all the answers

Why is the prevalence of asthma higher in developed countries compared to developing countries?

<p>Lack of pathogen exposure during childhood (B)</p> Signup and view all the answers

Which cells release cytokines IL-4 and IL-13 in atopic asthma?

<p>T-helper 2 (TH2) lymphocytes (A)</p> Signup and view all the answers

Which cells are activated by IL-5 in asthma?

<p>Eosinophils (C)</p> Signup and view all the answers

Which cells release granule contents and mediators in asthma?

<p>Mast cells (A)</p> Signup and view all the answers

Which cytokines released by TH2 lymphocytes stimulate IgE production?

<p>Interleukin-4 (IL-4) and Interleukin-13 (IL-13) (C)</p> Signup and view all the answers

Which cytokine released by TH2 lymphocytes stimulates mucus production?

<p>Interleukin-13 (IL-13) (D)</p> Signup and view all the answers

Which chemical mediators are involved in triggering the immediate phase reaction in asthma?

<p>Histamines, prostaglandin D2, and leukotrienes (B)</p> Signup and view all the answers

Which cells release mediators and granule contents in asthma?

<p>Mast cells (B)</p> Signup and view all the answers

The early (immediate) phase reaction in asthma occurs within minutes of exposure to:

<p>Allergens (A)</p> Signup and view all the answers

What role do reflex neural pathways play in bronchoconstriction during the early phase reaction?

<p>They constrict smooth muscles. (C)</p> Signup and view all the answers

Which phase of the immune response occurs within minutes of antigen exposure in asthma?

<p>Immediate phase reaction (A)</p> Signup and view all the answers

Which of the following is NOT a characteristic feature of the early (immediate) phase reaction in asthma?

<p>Decreased vascular permeability (D)</p> Signup and view all the answers

Which type of leucocytes are recruited to the site of reaction during the late phase reaction in asthma?

<p>Eosinophils, neutrophils, basophils, lymphocytes and monocytes (C)</p> Signup and view all the answers

Which chemokine is a potent chemoattractant and activator of eosinophils in asthma?

<p>Eotaxin (D)</p> Signup and view all the answers

What are the primary cells recruited by chemokines in asthma?

<p>T-helper 2 (TH2) lymphocytes (B)</p> Signup and view all the answers

Which of the following is NOT the characteristic feature of airway remodelling in asthma?

<p>Thinning of airway smooth muscle (D)</p> Signup and view all the answers

What do Charcot-Leyden crystals in the mucus of asthma patients consist of?

<p>Crystalloids made of eosinophil protein galectin-10 (A)</p> Signup and view all the answers

What is the effect of factors released from eosinophils during the late phase reaction in asthma?

<p>Damage to the bronchial epithelium (A)</p> Signup and view all the answers

When does the remodeling of the airways in asthma become irreversible?

<p>When fibrosis and scarring occur (D)</p> Signup and view all the answers

What is the consequence of the airway remodeling in asthma on the effectiveness of medications?

<p>Medications become less effective. (C)</p> Signup and view all the answers

What is the primary composition of Charcot-Leyden Crystals found in asthma?

<p>Eosinophil granules (B)</p> Signup and view all the answers

What is the consequence of Curschmann Spirals in asthma?

<p>Block gas exchange and medication (B)</p> Signup and view all the answers

Which of the following is NOT a symptom of bronchial asthma?

<p>Fatigue (D)</p> Signup and view all the answers

What is a key feature of the episodes in bronchial asthma?

<p>They are recurrent with remissions in between (D)</p> Signup and view all the answers

Which of the following is NOT a requirement for considering a patient as suspected asthma?

<p>Presence of crackles on auscultation (D)</p> Signup and view all the answers

Which of the following is the gold standard measurement to assess responsiveness to bronchodilator treatment?

<p>Peak Expiratory Flow Rate (PEFR) (D)</p> Signup and view all the answers

What percentage improvement in peak flow rate between pre and post treatment indicates responsiveness to bronchodilator treatment?

<blockquote> <p>12% (B)</p> </blockquote> Signup and view all the answers

What is the primary trigger for acute exacerbation of bronchial asthma?

<p>Upper Respiratory Tract Infection (URTI) (A)</p> Signup and view all the answers

What is an acute exacerbation of bronchial asthma (AEBA) characterized by?

<p>Flare-ups of underlying asthma triggered by specific factors (B)</p> Signup and view all the answers

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