Describe how fat can be made from an excess of each of the energy nutrients—carbohydrate, protein, or fat
Surplus carbohydrate (glucose) is first stored as glycogen in the liver and muscles, but the glycogen-storing cells have a limited capacity. Once glycogen stores are filled, most of the additional carbohydrate is burned for energy, displacing the body's use of fat for energy and allowing body fat to accumulate.
Surplus dietary fat contributes more directly to the body's fat stores. After a meal, fat is routed to the body's adipose tissue, where it is stored until needed for energy. Thus, excess fat from food easily adds to body fat.
Surplus protein may also contribute to body fat. If not needed to build body protein (as in response to physical activity) or to meet energy needs, amino acids will lose their nitrogens and be converted, through intermediates, to triglycerides. These, too, swell the fat cells and add to body weight.
You might also like to view...
In free-living older adults, nutritional risk status was found to be the most important predictor of _____.
A. total number of physician visits B. home visits by physicians C. ambulatory surgery rates D. medication rates E. total number of pharmacy visits
The part of a triglyceride that can be made into glucose is:
a. the saturated fatty acids. b. the medium-chain fatty acids. c. the unsaturated fatty acids. d. the long-chain fatty acids. e. the glycerol backbone.
Valerie is eating lunch at the college cafeteria and is determined not to gain weight during her freshman year at college. She realizes that controlling portion size is the key to not over indulging. Which of the following visual references would equal 1 cup of pasta?
a. Four thumbs together b. Palm of one hand c. Three clenched fists d. Two hands, cupped
Which of the following is a form of traditional Chinese medicine?
a. bioelectromagnetic therapy b. acupuncture c. chiropractic d. therapeutic touch