Why does the body draw calcium out of the bones even if the bones may be thinned?
The bones serve as a repository of calcium that can be taken by or returned from the blood as needed. The blood calcium levels are held in a narrow range by the action of hormones. The body requires calcium for nerve function, muscle contraction, blood clotting, hormone secretion, and enzyme function. If the diet does not contain adequate calcium or vitamin D to keep the blood calcium levels in the necessary range, the bones will be required to release calcium to the blood. This will lead to further reduction in bone density.
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Risk factors for eating disorders include ________.
A. pursuing a college degree B. being a physically active adolescent male C. having a history of frequent attempts to lose weight D. training to become a master chef
Which factor does not promote tooth decay?
a. the type of carbohydrate consumed b. the frequency of carbohydrate intake c. the stickiness of foods consumed d. the fat content of foods consumed e. saliva production
People with a high percentage of muscle mass can have a BMI over 25 even though they
A. don't exercise. B. are underweight. C. have a high percentage of body fat. D. have a low percentage of body fat.
Joe is taking a nutrition course and is told that the galactose in his milk ends up as glucose. Where does this conversion take place?
a. Brain b. Liver c. Gallbladder d. Appendix e. Pancreas