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 D
Explanation
Choice A reason: Positive Trousseau's sign
Trousseau's sign is indicative of hypocalcemia, not CTS. It is elicited by inflating a blood pressure cuff on the upper arm to above systolic pressure for 3 minutes. A positive sign is characterized by carpal spasm, which is not related to CTS.
Choice B reason: Cool extremities
Cool extremities can be a result of various conditions, including peripheral vascular disease or hypothyroidism. They are not a specific indicator of CTS, which primarily affects nerve function rather than blood circulation or temperature regulation.
Choice C reason: Decreased radial pulse
A decreased radial pulse is not typically associated with CTS. It may indicate a cardiovascular issue or a blockage in the radial artery, which would require further investigation unrelated to CTS.
Choice D reason: Positive Phalen's sign
Phalen's sign is a diagnostic test for CTS. The test is performed by having the patient flex their wrist maximally and hold the position for about 60 seconds. A positive Phalen's sign, which includes numbness and tingling in the thumb, index finger, middle finger, and the radial half of the ring finger, is indicative of CTS. This occurs due to increased pressure on the median nerve when the wrist is in flexion.
Correct Answer is A
Explanation
Choice A reason:
Babinski's sign is a neurological reflex that's tested by stroking the sole of the foot. A positive Babinski's sign, which is normal in infants but abnormal in adults, is indicated by dorsiflexion of the great toe (the toe points up) while the other toes fan out. This reflex suggests dysfunction of the corticospinal tract, which may be due to various neurological conditions. In the context of a stuporous patient with an unrepaired femur fracture, a positive Babinski's sign could indicate an acute neurological change possibly related to the injury or a secondary complication such as a fat embolism syndrome, which can occur after fractures and may affect the brain.
Choice B reason:
Pronation of the arms is not associated with Babinski's sign. Pronation is a rotational movement where the hand and upper arm are turned inwards. While arm movements are part of the neurological examination, they do not constitute a response to the plantar reflex test used to elicit Babinski's sign.
Choice C reason:
Pinpoint pupils may indicate opioid overdose or damage to the pons due to various causes, but they are not a component of Babinski's sign. Pupil size and reaction to light are important in neurological assessments, but they are separate from the reflexes tested by the Babinski sign.
Choice D reason:
Jerking contractions of the head and neck are not related to Babinski's sign. These could be indicative of seizure activity or other neurological disorders but are not a response to the plantar reflex test.
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