Answer to Question 1
d
Answer to Question 2
Latitude, season, and time of day all have dramatic effects on vitamin D synthesis and status. Heavy cloud cover, smoke, or smog blocks the ultraviolet (UV) rays of the sun that promote vitamin D synthesis. Differences in skin pigmentation, latitude, and smog may account for the finding that African Americans, especially those in northern, smoggy cities, are most likely to be vitamin D deficient and develop rickets. Vitamin D deficiency is especially prevalent in the winter and in the Arctic and Antarctic regions of the world. To ensure an adequate vitamin D status, supplements may be needed. The body's vitamin D supplies from summer synthesis alone are insufficient to meet winter needs.
The adrenal glands. These glands sit on top of each kidney. Each adrenal is subdivided into an outer
An aryballe vase or decanter made for carrying body oils clearly demonstrates that ancient Greeks we
The Median Age of the U.S. Population
The clinical division of the abdominal region into quadrants with related organs and structures.
End Moraines of the Great Lakes Region
CAP–cAMP complex binding to the CAP binding region