Which of the following skin conditions is characterized by depigmentation from the loss of cutaneous melanocytes in the skin?
Eczema
Vitiligo
Psoriasis
Rosacea
The Correct Answer is B
A. Eczema (atopic dermatitis) is an inflammatory skin condition characterized by itching, redness, and dry patches. It does not involve the loss of melanocytes or result in depigmentation.
B. Vitiligo is an autoimmune condition in which melanocytes (pigment-producing cells) are destroyed, leading to well-defined patches of depigmented (white) skin.
C. Psoriasis is a chronic autoimmune condition marked by rapid skin cell turnover, causing red, scaly, and sometimes silvery plaques—pigmentation changes are not typical.
D. Rosacea is a chronic facial skin condition involving redness, visible blood vessels, and sometimes acne-like bumps. It does not cause depigmentation or loss of melanocytes.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. High muscle tone and advanced motor skills – Children with Down syndrome (trisomy 21) typically have hypotonia (low muscle tone) and delayed motor development.
B. Tall stature and rapid weight gain – These children often have short stature and can have growth delays, not rapid weight gain.
C. Distinct facial characteristics and delayed physical development –Common features include upward slanting eyes, flat nasal bridge, epicanthal folds, and small stature, along with delays in physical and motor development.
D. Normal cognitive development and speech abilities – While the degree can vary, most children with trisomy 21 have some level of intellectual disability and speech delays.
Correct Answer is ["2"]
Explanation
Answer: 2 mL
Rationale:
Desired dose = 50 mg
Available concentration = 25 mg/mL
mL to administer = Desired dose ÷ Available concentration
mL to administer = 50 mg ÷ 25 mg/mL = 2 mL
Final Answer: 2 mL
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