The requirement for vitamin D increases with age because
A) the kidneys lose their ability to convert it to the active form.
B) the skin's ability to make it from sunlight decreases.
C) the intestines lose their ability to absorb it.
D) All of the answers are correct.
D
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Once absorbed into the blood, the cholecalciferol travels to the kidney for the final step in activation.
a. true b. false
In both type 1 and type 2 diabetes, cells do not take up glucose appropriately. The cause for this is different in each disease. In type 1 diabetes insulin _____, while in type 2 diabetes insulin _____
A. from the pancreas is not recognized by cells; is not produced B. is no longer produced by the pancreas; cannot interact with cells due to defects in the insulin receptor C. from the pancreas is rapidly degraded; is made improperly
Which of the following is representative of folate availability in foods?
a. Good sources are dairy products and meats b. Poor sources are fruit juices and vegetable juices c. Much of the vitamin is lost due to heat and oxidation d. Only about 10% of the amount in foods is bioavailable
Which of the following is not among the richest food sources of starch?
a. Grains b. Fruits c. Legumes d. Tubers