Which of the following is an accurate description of a type-1 hypersensitivity reaction?
Most type-1 reactions are allergic
It is mediated by IgA.
It never contributes to autoimmune diseases.
Most occur against medications
The Correct Answer is A
A. Most type-1 reactions are allergic: This statement is accurate. Type-1 hypersensitivity reactions are typically associated with allergies. When a person is exposed to a specific allergen (like pollen or certain foods), their immune system overreacts, leading to various symptoms, from mild to severe.
B. It is mediated by IgA: This statement is incorrect. Type-1 hypersensitivity reactions are primarily mediated by immunoglobulin E (IgE) antibodies. When these antibodies bind to allergens, they trigger the release of histamine and other chemicals, causing allergic symptoms.
C. It never contributes to autoimmune diseases: This statement is incorrect. While type-1 hypersensitivity reactions are often associated with allergies, they are distinct from autoimmune diseases. In autoimmune diseases, the immune system mistakenly attacks the body's own cells and tissues, which is a different mechanism from hypersensitivity reactions.
D. Most occur against medications: This statement is not entirely accurate. While some type-1 hypersensitivity reactions can be triggered by medications (like penicillin), they can also be caused by various other allergens such as pollen, animal dander, insect venom, and certain foods. The prevalence of medication-induced type-1 reactions varies, and it's not accurate to say that most occur against medications.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Wear high-top shoes to avoid tendon rupture:
This statement is incorrect. Tendon rupture is a known side effect of fluoroquinolone antibiotics like ciprofloxacin, especially in certain populations. However, wearing high-top shoes does not prevent this. Patients should be educated about the signs of tendon pain, swelling, or inflammation and should be advised to stop the medication and contact their healthcare provider if they experience such symptoms.
B. Use a barrier method of birth control (condoms) during antibiotic use:
This statement is partially correct. Antibiotics like ciprofloxacin do not interfere with the efficacy of hormonal birth control methods like pills, patches, or injections. However, it's advisable to use a barrier method like condoms as an additional form of contraception while taking antibiotics. This is to prevent potential interactions and ensure maximum contraceptive effectiveness.
C. Do not use any bronchodilator inhalers while taking the drug:
This statement is incorrect. Ciprofloxacin does not interact negatively with bronchodilator inhalers. Patients can continue using their prescribed inhalers as directed by their healthcare provider, especially if they are being used for conditions like asthma or chronic obstructive pulmonary disease (COPD).
D. Stop the medication as soon as you feel better:
This statement is incorrect. It's crucial for patients to complete the entire course of antibiotics as prescribed, even if they start feeling better before the course is finished. Stopping antibiotics prematurely can lead to incomplete eradication of the infection, potentially allowing the bacteria to develop resistance and cause a recurrence of the illness.
Correct Answer is D
Explanation
A. "The antibiotic I have been taking doesn't work as well as it used to."
This statement shows awareness of decreased effectiveness, which can occur due to drug resistance. Bacteria can become resistant to antibiotics, leading to reduced efficacy of the medication over time.
B. "The bacteria in my body have become resilient."
This statement correctly attributes resistance to the bacteria. Resilience in this context means that bacteria have developed mechanisms to survive the effects of antibiotics, making the treatment less effective.
C. "Over time, an organism that had once been highly sensitive to an antibiotic may become less susceptible, or it may lose drug sensitivity entirely."
This statement accurately describes the concept of drug resistance. Bacteria can lose sensitivity to antibiotics, rendering the drugs ineffective against them.
D. "My body has become resistant to the antibiotic."
This statement is incorrect. It's the bacteria that develop resistance, not the patient's body. Patients don't become resistant to antibiotics; instead, bacteria evolve and adapt, making the drugs less effective against them.
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