Why does the body control the amount of iron that is absorbed?
Iron is difficult for the body to release and so it can build up to harmful levels. High iron levels can cause oxidative damage to the tissues, which can increase inflammation and decrease their ability to function. Also, infectious bacteria can thrive in the presence of high levels of iron. Thus, the body uses several mechanisms to regulate the amount of iron that is absorbed from the diet.
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The external energy cycle includes
a. the moon b. growing plants c. crystals d. metabolism
Nutritional and physical activity recommendations that may benefit women at risk for preeclampsia include all of the following EXCEPT:
a. high-dose iron supplements. b. 5 or more servings of fruits and vegetables daily. c. moderate exercise. d. adequate fiber intake e. adequate vitamin D.
_____ relates to the pattern of gene expression regulated by modification of DNA
a. The Human Genome Project b. Genetics c. Nutrigenomics d. Epigenetics
The process used to transport some molecules across cell membranes against the prevailing concentration gradient requires _____ and _____
a. ADP, ATP b. ATP, a transport protein c. osmosis, diffusion d. ADP, osmosis