Which of the following best describes anaphylaxis?
A chronic autoimmune disorder that causes progressive damage to the respiratory lining
A localized inflammatory response resulting in a mild skin rash and pruritus
A severe, systemic reaction characterized by airway obstruction and cardiovascular shock
A non-allergic food intolerance that leads to temporary gastrointestinal distress
The Correct Answer is C
A. A chronic autoimmune disorder affecting the respiratory lining, such as asthma or chronic bronchitis, is not the same as anaphylaxis. These conditions involve long-term inflammation but are not acute, systemic allergic reactions.
B. A mild, localized allergic response, such as hives or itching (pruritus), involves limited areas of the body and does not threaten life. Anaphylaxis, in contrast, is systemic and life-threatening.
C. Anaphylaxis is a severe, systemic allergic reaction that can rapidly affect multiple organ systems. It often includes symptoms such as airway swelling, bronchoconstriction, hypotension, rapid pulse, dizziness, and even cardiovascular shock. Without prompt treatment, typically with intramuscular epinephrine, anaphylaxis can be fatal. The reaction is usually triggered by allergens such as foods, insect stings, medications, or latex.
D. Non-allergic food intolerances, such as lactose intolerance, can cause gastrointestinal discomfort like bloating, cramping, or diarrhea, but they do not involve systemic immune activation, airway obstruction, or cardiovascular collapse.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["C","D","E"]
Explanation
A. Childhood generally refers to the period after toddlerhood and infancy, typically from ages 3–12. It is not one of the first three stages of the human life cycle.
B. Puberty is a developmental milestone within adolescence and occurs much later in the life cycle. It is not part of the first three stages.
C. The prenatal stage begins at conception and continues until birth. This stage encompasses all development within the womb, including cell division, organ formation, and growth, laying the foundation for life after birth.
D. Infancy follows birth and generally spans from birth to about 12 months. During this stage, rapid growth, motor development, and sensory and cognitive milestones occur.
E. The toddler stage typically covers ages 1–3 years. This stage is marked by increased mobility, language development, social interaction, and early learning experiences.
Correct Answer is B
Explanation
A. Four hours is longer than the recommended safe time for perishable foods to remain at temperatures where bacteria can grow. Even with cool weather, bacteria multiply rapidly in the “danger zone” (40°F–140°F).
B. Perishable foods, including cooked meats, salads with mayonnaise, eggs, and cut fruits, should not be left out at room temperature for more than 2 hours (or 1 hour if the ambient temperature is above 90°F). Keeping foods on ice helps slow bacterial growth, but 2 hours is the generally accepted limit to prevent foodborne illness. After this period, foods should be discarded to ensure safety.
C. Thirty minutes is unnecessarily conservative for most outdoor temperatures. While shorter exposure is safer, perishable foods can remain safe for up to 2 hours under controlled conditions with ice.
D. Six hours far exceeds the safe limit. Perishable foods left out this long, even on ice, are at high risk for bacterial contamination and could cause foodborne illness.
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