A patient is especially worried about an area of skin on her feet that has turned white.
The health care provider has told her that her condition is vitiligo.
The nurse explains to her that vitiligo is:
Caused by the complete absence of melanin pigment.
Caused by an excess of apocrine glands in her feet.
Related to impetigo and can be treated with an ointment.
Caused by an excess of melanin pigment.
The Correct Answer is A
Choice A rationale
Vitiligo is a condition caused by the destruction or malfunction of melanocytes, the cells responsible for producing melanin pigment. This leads to the development of white patches on the skin, as melanin is absent in these areas. Vitiligo is an autoimmune condition and can affect any part of the body, including the skin, hair, and mucous membranes.
Choice B rationale
Excess apocrine glands in the feet are not related to vitiligo. Apocrine glands are sweat glands found primarily in the underarm and genital areas and are responsible for the secretion of a thick, odorless fluid. Their overactivity does not result in the white patches seen in vitiligo.
Choice C rationale
Impetigo is a bacterial skin infection characterized by red sores, blisters, and crusting. It is not related to vitiligo and does not cause depigmentation. Impetigo is treated with antibiotics, whereas vitiligo requires different management strategies to address the loss of pigment.
Choice D rationale
Vitiligo is not caused by an excess of melanin pigment. Rather, it is the result of melanin loss or the absence of melanocytes in certain areas of the skin, leading to the characteristic white patches.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Scleroderma is a chronic autoimmune disorder characterized by hardening and tightening of the skin and connective tissues. While it affects the skin, it is unrelated to emphysema and bronchitis, making it an unlikely finding in this client.
Choice B rationale
Pedal erythema, or redness of the feet, can result from various causes, including infections, allergies, and circulatory issues. However, it is not commonly associated with emphysema and bronchitis, making it an unlikely finding in this client.
Choice C rationale
Anasarca is generalized body swelling due to fluid retention, often seen in severe heart failure, liver disease, and kidney failure. While this condition involves significant swelling, it is not typically linked to emphysema and bronchitis.
Choice D rationale
Clubbing of the nails is a common finding in chronic respiratory conditions like emphysema and bronchitis. It involves bulbous enlargement of the fingertips and nail curvature, resulting from prolonged low oxygen levels, making it a likely finding in this client.
Correct Answer is D
Explanation
Choice A rationale
The Whisper test evaluates hearing acuity, while the Romberg test assesses balance and proprioception by having the client stand with feet together and eyes closed. Both tests involve sensory assessments but do not directly assess cranial nerve VIII, which is the vestibulocochlear nerve responsible for hearing and balance.
Choice B rationale
PERRLA (pupils equal, round, reactive to light and accommodation) assesses cranial nerves II and III, while EOMs (extraocular movements) assess cranial nerves III, IV, and VI. These tests do not evaluate cranial nerve VIII.
Choice C rationale
Snellen and Rosenbaum tests measure visual acuity for distance and near vision, respectively. These tests assess cranial nerves II and III but do not evaluate cranial nerve VIII.
Choice D rationale
The Rinne and Weber tests are audiometric assessments that specifically evaluate cranial nerve VIII, which controls hearing and balance. The Rinne test compares air and bone conduction of sound, while the Weber test assesses sound lateralization, making them appropriate tests for assessing cranial nerve VIII.
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