1. The reactions the vitamin B12 coenzyme participates in do all of the following except: a. convert homocysteine to methionine. b. help produce DNA and RNA. c. produce succinyl CoA. d. untrap folate.
2. Which of the following proteins does not bind vitamin B12 and assist with absorption and transport? a. intrinsic factor b. transcobalamin c. pepsin d. R protein
3. Good dietary sources of magnesium include all of the following except: a. green leafy vegetables. b. whole grains. c. refined foods. d. legumes.
4. The hormone–triggered actions which increase blood calcium levels include all of the following except: a. increased kidney loss of calcium. b. increased calcium absorption. c. increased bone calcium resorption. d. increased kidney resorption of calcium.
5. Symptoms of severe magnesium deficiency mainly include: a. anemia. b. bone loss. c. heart problems. d. abnormal nerve and muscle function.
6. Blood phosphorus concentrations are regulated by all of the following hormones except: a. thyroid hormone. b. calcitriol. c. calcitonin. d. parathyroid hormone.
7. Major roles of sodium include all of the following except: a. nerve function. b. muscle contractions. c. fluid balance. d. enzyme cofactor.
8. Symptoms of calcium toxicity include all of the following except: a. reduced mineral absorption. b. calcium deposits in soft tissues. c. impaired kidney function. d. increased bone density.
9. Which major mineral is present in most foods and is also obtained from processed foods and some soft drinks? a. sodium b. potassium c. phosphorus d. calcium
10. The main functions of potassium include all of the following except: a. nerve function. b. fluid balance. c. muscle contractions. d. enzyme cofactor
11. The body loses water through all of the following routes except: a. urine. b. sweat. c. metabolism. d. breath.
12. Functions of phosphorus include all of the following except: a. fluid balance. b. energy metabolism. c. acid–base balance. d. bones and teeth.
13. Calcium is critical for each of the following functions except: a. antioxidant protection. b. muscle contraction. c. blood clotting. d. nerve transmission.
14. Sodium and chloride deficiencies are rare and are most likely to occur in all of the following except: a. diarrhea. b. insufficient intake. c. endurance athletes. d. vomiting.
15. The least vulnerable group to suffer dehydration would be: a. the obese. b. athletes. c. the elderly. d. infants.