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A student athlete notices that their fingernails grow continuously throughout the sports season, requiring regular trimming. What does this reveal about cell division in the nail matrix where nails develop?
Question 8 options:
The nail matrix has continuous cell division producing new nail cells that push outward
Nail cells divide only during athletic seasons when physical activity increases
Old nail cells transform into new ones without actual cellular reproduction
Nail growth doesn't involve cell division, just expansion of existing cells
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The nail matrix has continuous cell division producing new nail cells that push outward.
Explanation: Nail growth is from mitotic activity in the nail matrix (keratin-producing epithelial cells). New cells form, become keratinized, and are pushed outward as the visible nail — it’s continuous and not caused by "transformation" of old cells or by expansion of existing cells alone.
Explanation: Nail growth is from mitotic activity in the nail matrix (keratin-producing epithelial cells). New cells form, become keratinized, and are pushed outward as the visible nail — it’s continuous and not caused by "transformation" of old cells or by expansion of existing cells alone.
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