Question

exam lesson name: the human body
exam number: 700946rr
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question 19 of 20 :
select the best answer for the question.

1. which of the following is false of the integumentary system?

○ a. keratin is the pigment responsible for skin color
○ b. too much uv radiation can mutate dna in skin cells and cause cancer
○ c. the body produces more melanin with stronger sunlight exposure
○ d. the inner layer of the epidermis divides quickly

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Explanation:

To solve this, we analyze each option:

• Option A: Keratin is a protein that provides structural support to skin, hair, etc. Melanin is the pigment for skin color. So this statement is false.
• Option B: UV radiation can damage DNA in skin cells, leading to mutations and cancer. This is true.
• Option C: The body increases melanin production with more sunlight (to protect skin), which is true.
• Option D: The inner layer of the epidermis (stratum basale) has rapidly dividing cells. This is true.

Answer:

A. Keratin is the pigment responsible for skin color