What manifestation is most indicative of anaphylaxis, rather than a mild allergic reaction?
Red rash
Hypotension
Itching of the arms
Hives
The Correct Answer is B
Rationale:
A. A red rash is a common symptom of a mild allergic reaction. It is usually confined to the skin and may be accompanied by localized redness or warmth, but it does not indicate systemic involvement or a life-threatening condition. While it signals that the immune system is reacting, it alone is not a marker of severe allergic response.
B. Hypotension, or low blood pressure, is a key indicator of anaphylaxis, which is a severe, rapid-onset, systemic allergic reaction. During anaphylaxis, widespread vasodilation and increased vascular permeability occur as a result of massive histamine and chemical mediator release. This leads to fluid leaking from the blood vessels into surrounding tissues, causing a sudden drop in blood pressure. Hypotension in this context is dangerous because it can lead to shock, organ failure, and death if not treated immediately. Its presence distinguishes anaphylaxis from mild allergic reactions, which usually involve only localized symptoms such as rashes or itching.
C. Localized itching is a common symptom of a mild allergic reaction. While uncomfortable, itching does not indicate systemic involvement or imminent danger and is usually treated with antihistamines. It is not an emergency symptom by itself.
D. Hives, also called urticaria, appear in both mild and severe allergic reactions. They are raised, red, itchy areas on the skin. However, hives alone do not indicate anaphylaxis. They become concerning when accompanied by systemic symptoms such as hypotension, swelling of the airway (laryngeal edema), or difficulty breathing.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Rationale:
A. An ulcer is a full-thickness loss of skin that extends through the epidermis and into the dermis, and sometimes even deeper tissues depending on severity. Ulcers often appear as open sores or cavities, which may weep fluid, bleed, or form a crust. Common causes include pressure (pressure ulcers), vascular insufficiency (venous or arterial ulcers), trauma, infection, or chronic inflammation. Clinically, ulcers can vary in size, depth, and appearance, and they are at risk for infection, delayed healing, or tissue necrosis if not properly managed.
B. A fissure is a narrow, linear crack in the skin, usually occurring in areas where the skin is dry, tight, or under mechanical stress. Examples include cracks at the corners of the mouth (angular cheilitis) or on the soles of the feet or heels. Unlike an ulcer, a fissure does not create a broad cavity and generally does not involve extensive tissue loss.
C. A pustule is a small, raised lesion filled with pus, often less than 1 cm in diameter. Pustules are commonly seen in acne, folliculitis, or bacterial infections. Pustules are superficial; the skin remains mostly intact, unlike an ulcer where tissue is destroyed.
D. A macule is a flat, circumscribed area of discoloration, less than 1 cm in diameter. Examples include freckles, flat moles, or some rashes. A macule does not involve any loss of skin tissue, bleeding, or exudate, so it is distinctly different from an ulcer.
Correct Answer is C
Explanation
Rationale:
A. Hormones generally regulate growth, metabolism, and cellular function, but they do not directly trigger apoptosis under normal physiological conditions. Some hormonal changes can indirectly influence apoptosis, but they are not a primary trigger.
B. Progression through the cell cycle is part of normal cell division. While errors in the cell cycle can lead to apoptosis, progression itself is not a trigger; rather, checkpoints detect abnormalities and may initiate apoptosis if needed.
C. Apoptosis, also called programmed cell death, can be triggered by cellular aging (senescence). Over time, cells accumulate DNA damage, oxidative stress, and loss of organelle function, signaling pathways activate apoptosis to remove aged or damaged cells. This process is essential for tissue homeostasis and preventing the accumulation of dysfunctional cells.
D. Differentiation is the process by which cells specialize to perform specific functions. While differentiation may lead to eventual cell turnover, the act of differentiation itself does not trigger apoptosis. Apoptosis occurs later if the differentiated cell becomes damaged or reaches the end of its lifespan.
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