A student tells the school nurse that she knows that ultraviolet light is always harmful to a person. The nurse shares with the student that ultraviolet light has some positive effects as well
Which of the following effects is the most positive effect of ultraviolet light? a. Absorption of ultraviolet light is necessary for the conversion of substances to vitamin D.
b. Ultraviolet light can help tan a person's body.
c. Ultraviolet light has a major influence on mood and can counteract the effects of major depression.
d. Ultraviolet light helps crops grow at a more even growth rate over time.
A
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A Correct. The absorption of ultraviolet light is necessary for the conversion of substances to vitamin D.
B Incorrect. Ultraviolet light can tan a person's body; however, tanning is not considered a positive attribute of ultraviolet light for one's health.
C Incorrect. While light may counteract the effects of depression, this feature is not as important as that of converting substances to vitamin D.
D Incorrect. The impact of ultraviolet light on the growth of crops is not the most positive effect.
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