Vitamin D Synthesis in the Skin Is Affected by All

question 6

Multiple Choice

Vitamin D synthesis in the skin is affected by all of the following EXCEPT

• A)use of sunscreen.
• B)skin color.
• C)geographic location.
• D)All of these factors can affect vitamin D synthesis.

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Definitions:

Base Level

The lowest point to which a stream or river can erode its channel, often determined by the body of water into which the river flows, such as an ocean, lake, or larger river.

Subsidence

The process by which the earth's surface sinks or lowers, often due to natural underground material movement or removal of groundwater.

Average Gradient

The average gradient refers to the rate of elevation change over a particular distance, often used in geographical and hydrological analysis to describe slopes.

Base Level

The lowest point to which erosion by running water can lower the landscape, ultimately the sea level or lake level where rivers end.