A keloid is an abnormally large scar due to an overproduction of ________.
A. keratin
B. elastin
C. sebum
D. collagen
Answer:D
A keloid is an abnormally large scar due to an overproduction of ________.
A. keratin B. elastin C. sebum D. collagen
Explanation: A) A keloid does not contain keratin.