A nurse is assessing a client's immune function by reviewing the laboratory value of the cellular response of the T-cells. The nurse should recognize that which of the following conditions is affected by the T-cells?
Hay fever allergy
Anaphylaxis
Transplant rejection
Bacterial phagocytosis
The Correct Answer is C
Choice A reason:
Hay fever allergy, also known as allergic rhinitis, is primarily associated with the action of Immunoglobulin E (IgE) antibodies and not directly with T-cells. T-cells can contribute to the regulation of the immune response in allergies, but IgE is the main immunoglobulin involved in the typical symptoms of hay fever.
Choice B reason:
Anaphylaxis is a severe, potentially life-threatening allergic reaction that involves the release of large amounts of histamine and other chemicals from mast cells and basophils, often triggered by IgE antibodies. While T-cells can play a role in the sensitization phase of allergy, anaphylaxis itself is not directly caused by T-cells.
Choice C reason:
Transplant rejection is a process in which T-cells play a central role. When a transplant recipient's immune system recognizes the donated organ as foreign, T-cells can mediate the rejection by attacking the transplanted tissue, leading to its failure.
Choice D reason:
Bacterial phagocytosis is primarily the function of phagocytes like neutrophils and macrophages. T-cells are involved in the adaptive immune response and can activate phagocytes, but they do not directly perform phagocytosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","C","D"]
Explanation
The correct answer is: a. Temperature, c. Color, d. Sensation.
Choice A: Temperature
Reason: Monitoring the temperature of the affected extremity is crucial in evaluating neurovascular status. A cool or cold extremity can indicate decreased perfusion, which may be a sign of neurovascular compromise. Normal skin temperature should be warm to the touch, indicating adequate blood flow.
Choice B: Ecchymosis
Reason: Ecchymosis, or bruising, is not a direct indicator of neurovascular status. While it can provide information about trauma or bleeding, it does not assess the functionality of nerves or blood vessels in the affected extremity.
Choice C: Color
Reason: Assessing the color of the extremity is essential. Pallor or cyanosis can indicate poor blood flow or oxygenation, which are critical signs of neurovascular impairment. Normal color should be consistent with the rest of the body, indicating good circulation.
Choice D: Sensation
Reason: Evaluating sensation helps determine if there is any nerve damage or impairment. Changes in sensation, such as numbness or tingling, can indicate neurovascular compromise. Normal sensation should be intact and symmetrical with the unaffected extremity.
Choice E: Skin Integrity
Reason: While skin integrity is important for overall wound healing and infection prevention, it is not a primary parameter for assessing neurovascular status. It does not provide direct information about blood flow or nerve function.
Correct Answer is C
Explanation
Choice A Reason:
A 10 mm wheal is not indicative of TB infection. A wheal is a raised, often itchy area of skin that usually signifies an allergic reaction, not an infection. The TST looks for induration, which is a firm swelling, as a sign of TB infection.
Choice B Reason:
A 5 mm induration is considered positive in certain high-risk groups, such as people living with HIV, recent contacts of TB patients, or those with a history of organ transplants. For individuals without these risk factors, a 5 mm induration is not considered a positive result.
Choice C Reason:
A 15 mm induration is considered a positive TST result for individuals with no known risk factors for TB. This indicates that the person's immune system has reacted to the tuberculin purified protein derivative (PPD) injected under the skin, suggesting exposure to TB bacteria.
Choice D Reason:
Erythema, or redness of the skin, is not measured when interpreting TST results. The test measures induration, which is a palpable, raised, hardened area or swelling. Therefore, a 4 mm erythema does not indicate TB infection.
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