Which of the following skin changes is most commonly associated with aging?
Thickening of the epidermis
Decreased collagen production
Increased sebaceous gland activity
Increased number of melanocytes
The Correct Answer is B
A. Thickening of the epidermis: Aging typically leads to thinning of the epidermis rather than thickening, making skin more fragile.
B. Decreased collagen production: Decreased collagen synthesis and fragmentation of existing collagen in the dermis result in thinning, decreased elasticity, and wrinkling with age.
C. Increased sebaceous gland activity: Sebaceous gland activity generally declines with age, often causing drier skin rather than increased oiliness.
D. Increased number of melanocytes: The number of melanocytes tends to decrease with age, though remaining melanocytes can become more irregular and form age spots.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Osteoblasts; osteopetrosis:Osteoblasts build bone matrix and excessive activity leads to denser bone, not osteopetrosis, which involves defective bone resorption.
B. Osteoclasts; osteoporosis:Osteoclasts break down bone tissue during remodeling; when their activity outweighs bone formation, it can result in osteoporosis due to bone loss.
C. Osteocytes; osteoporosis:Osteocytes maintain the bone matrix and act as mechanosensors but do not perform resorption that causes bone thinning.
D. Chondrocytes; osteoarthritis:Chondrocytes maintain cartilage tissue, and their degeneration contributes to osteoarthritis rather than affecting bone resorption.
Correct Answer is B
Explanation
A. Osteoclast:Osteoclasts resorb (break down) bone matrix during remodeling rather than forming new bone.
B. Osteoblast:Osteoblasts synthesize osteoid and initiate its mineralization, producing new bone tissue during growth and repair.
C. Osteocyte:Osteocytes are mature bone cells embedded in matrix that maintain bone tissue and act as mechanosensors rather than actively forming new bone.
D. Chondrocyte:Chondrocytes produce and maintain cartilage matrix and are not the primary cells responsible for bone formation.
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