Why are some fatty acids considered essential, and what are their roles in the body?
Linoleic acid and linolenic acid are essential fatty acids because the body cannot add a double bond in a fatty acid between the third and fourth or sixth and seventh carbons from the methyl end. Essential fatty acids (EFA) are precursors to eicosanoids, which are involved in regulating the immune and cardiovascular systems and act as chemical messengers to direct a variety of physiological functions (such as blood pressure regulation). Linolenic acid serves as a precursor for components of membranes in nerve tissue and the retina.
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A. Underwater weighing B. Skinfolds C. Bioelectrical impedance D. Body mass index
Children typically gain ____ or more pounds per year between one year of age and adolescence
a. 2 b. 3 c. 5 d. 7
What is an example of moderate-intensity activity?
A. power lifts B. sprinting C. swimming laps D. uphill hiking E. brisk walk
Sarcopenia refers to _____
a. loss of muscle mass b. vitamin deficiency c. bone loss d. malnutrition associated with aging e. fat loss