Which conditions may result from IgE antibodies reacting with antigens?

The correct answer relates to the conditions that arise from an immune response mediated by IgE antibodies. Immunoglobulin E (IgE) is primarily involved in allergic reactions and responses to parasitic infections. When IgE antibodies bind to specific antigens, they trigger the release of histamines and other chemicals from mast cells and basophils, leading to various allergic symptoms.

Asthma and hay fever are classic examples of conditions associated with IgE-mediated responses. Hay fever, also known as allergic rhinitis, occurs when allergens like pollen trigger an immune response, leading to symptoms such as sneezing, nasal congestion, and itchy eyes. In asthma, exposure to allergens can exacerbate the condition, leading to bronchoconstriction, inflammation, and difficulty breathing.

In contrast, the other choices list conditions that are primarily autoimmune or inflammatory in nature, rather than allergic. Myasthenia gravis and sarcoidosis are associated with different immune mechanisms that do not involve IgE antibodies. Similarly, rheumatoid arthritis and systemic sclerosis are autoimmune diseases characterized by chronic inflammation and tissue damage, while diabetes and thyroiditis are related to autoimmune processes targeting metabolic systems, rather than allergies. Thus, the connection to IgE antibodies is specific to conditions like asthma and hay