Which of the following is associated with moles, freckles, and vitiligo?
Bilirubin
Carotene
Keratin
Melanin
The Correct Answer is D
A. Bilirubin: Bilirubin is a yellow pigment derived from the breakdown of red blood cells, associated with jaundice rather than freckles or moles.
B. Carotene: Carotene is an orange pigment found in foods like carrots and can contribute to skin tone but is not the main factor in moles or vitiligo.
C. Keratin: Keratin is a structural protein found in skin, hair, and nails but does not influence pigmentation.
D. Melanin: Melanin is the pigment responsible for skin color, moles, freckles, and conditions like vitiligo, which causes depigmentation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Classified as skeletal, cardiac, and smooth: These classifications apply to muscle tissue, not adipose tissue.
B. Described as striated and voluntary: Striated and voluntary characteristics describe skeletal muscle, not adipose tissue.
C. Classified as endocrine and exocrine: Glands are classified as endocrine (hormone-secreting) or exocrine (secreting substances through ducts), but adipose tissue is connective tissue.
D. A type of connective tissue that stores fat: Adipose tissue is a specialized connective tissue that stores fat, insulates the body, and provides cushioning.
Correct Answer is B
Explanation
A. Increase the size of body structures: While tissue growth can contribute to body size, its primary function is not just increasing size but carrying out specific physiological roles.
B. Perform common functions: Tissues consist of similar cells that work together to perform specific functions, such as muscle contraction, nerve signaling, or support.
C. Deliver messages: Only nervous tissue specializes in transmitting messages, but other tissues have different functions.
D. Fight against diseases: The immune system fights diseases, but not all tissues are involved in this function.
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