Multiple Choice
Which of the following organs is involved in the synthesis of vitamin D?
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5. Integumentary System
Introduction to the Integumentary System
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Which of the following is a function of melanin in the integumentary system?
A
Acts as a barrier to pathogens
B
Protects the skin from ultraviolet radiation
C
Regulates body temperature
D
Produces vitamin D
Verified step by step guidance1
Understand the role of melanin in the integumentary system. Melanin is a pigment produced by cells called melanocytes, which are found in the skin.
Recognize that melanin's primary function is related to its ability to absorb ultraviolet (UV) radiation from the sun.
Consider how melanin protects the skin. By absorbing UV radiation, melanin helps to prevent damage to the DNA in skin cells, which can reduce the risk of skin cancer.
Differentiate between the functions listed in the problem. While the integumentary system does regulate body temperature and produce vitamin D, these are not functions of melanin itself.
Conclude that the function of melanin in the integumentary system is to protect the skin from ultraviolet radiation, as it absorbs and dissipates the harmful UV rays.
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