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Ch. 20 The Lymphatic System and Immunity
Amerman- Human Anatomy & Physiology 3e
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814Not the one you use?Change textbook
All textbooksAmerman 3rd EditionCh. 20 The Lymphatic System and ImmunityProblem L2.3
Chapter 20, Problem L2.3

Terrence has severe asthma and allergies, and is placed on a medication that blocks the functioning of IgE. How would this medication alleviate his symptoms?

Verified step by step guidance
1
Understand the role of IgE in the immune system: Immunoglobulin E (IgE) is an antibody that plays a key role in allergic reactions and asthma. It binds to allergens and triggers the release of histamine and other inflammatory chemicals from mast cells and basophils, leading to symptoms such as airway constriction, inflammation, and mucus production.
Recognize the mechanism of the medication: The medication blocks the functioning of IgE, preventing it from binding to allergens and activating mast cells and basophils. This reduces the release of histamine and other inflammatory mediators.
Explain how blocking IgE alleviates asthma symptoms: By inhibiting IgE activity, the medication reduces airway inflammation, bronchoconstriction, and mucus overproduction, which are common symptoms of asthma.
Describe how blocking IgE alleviates allergy symptoms: Allergic reactions, such as sneezing, itching, and swelling, are caused by the release of histamine and other chemicals. Blocking IgE prevents this release, thereby reducing allergic symptoms.
Summarize the overall effect: The medication helps manage Terrence's asthma and allergies by targeting the root cause—IgE-mediated immune responses—leading to improved breathing and reduced allergic reactions.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

IgE (Immunoglobulin E)

IgE is a type of antibody produced by the immune system in response to allergens. It plays a crucial role in allergic reactions by binding to allergens and triggering the release of histamines and other chemicals from mast cells, leading to symptoms such as inflammation, bronchoconstriction, and mucus production, which are particularly problematic for individuals with asthma.
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IgE

Asthma Pathophysiology

Asthma is a chronic respiratory condition characterized by inflammation and narrowing of the airways, often triggered by allergens, irritants, or exercise. The inflammation leads to increased mucus production and bronchoconstriction, resulting in symptoms like wheezing, coughing, and difficulty breathing. Understanding this pathophysiology is essential for comprehending how medications can alleviate symptoms.
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Mechanism of Action of IgE Blockers

Medications that block IgE function, such as monoclonal antibodies, work by preventing IgE from binding to allergens and activating mast cells. This inhibition reduces the release of inflammatory mediators, thereby decreasing the severity of allergic reactions and asthma symptoms. By targeting IgE, these medications can provide significant relief for patients with severe asthma and allergies.
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Related Practice
Textbook Question

Eileen presents with flu-like symptoms, including fever, chills, and body aches.

What part of the immune response is likely producing these symptoms?

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Textbook Question

Eileen presents with flu-like symptoms, including fever, chills, and body aches.

You order blood work and find that the number of neutrophils in the blood is greatly elevated. What does this tell you about the likely type of pathogen involved? Explain.

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Textbook Question

Eileen presents with flu-like symptoms, including fever, chills, and body aches.


c. What might it mean if lymphocytes instead of neutrophils were elevated? Explain your reasoning.

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