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When blood calcium is low,parathyroid hormone raises levels by doing all of the following EXCEPT:


A) increasing appetite for calcium containing foods.
B) activating vitamin D.
C) reducing calcium excretion by the kidney.
D) stimulating calcium release from bone.

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A

Whether an element is classified as a major or as a trace mineral is determined by:


A) the amounts needed daily by the body.
B) where they are absorbed in the digestive tract.
C) how critical they are for metabolic processes.
D) where they are found on the periodic table.

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As calcium intake increases:


A) the percentage absorbed declines.
B) active transport becomes more important.
C) more vitamin C is required.
D) more iron is absorbed.

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What is the role of a mineral cofactor?

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A mineral cofactor is an inorganic chemi...

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Which of the following is NOT a function of calcium?


A) Muscle contraction
B) ATP stabilization
C) Blood pressure regulation
D) Neurotransmitter release

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Good sources of magnesium include all of the following EXCEPT:


A) leafy green vegetables.
B) processed foods.
C) nuts.
D) whole grains.

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B

Which is the least plentiful source of calcium?


A) Carrots
B) Eggs
C) Sardines
D) Yogurt

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Magnesium's major functions in the body include all of the following EXCEPT:


A) blood clotting.
B) being a cofactor for many enzymes.
C) stabilizing ATP.
D) maintenance of bones.

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A

Milk-alkali syndrome is characterized by all of the following EXCEPT:


A) excessive use of calcium containing antacids.
B) high blood calcium.
C) increased secretion of PTH.
D) calcification of the kidney.

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Calcium in the blood can be measured.Is this a good indicator of bone health? Why or why not?

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Calcium in the blood, also known as seru...

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Which statement regarding lactose intolerance is true?


A) It must be treated with calcium supplements to avoid osteoporosis.
B) It means a person can eat no dairy products.
C) The symptoms can be avoided by using products treated with lactase.
D) Lactose intolerance is common in individuals of all ethnic backgrounds.

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Blood levels of magnesium are regulated primarily by:


A) the liver.
B) the amount consumed in the diet.
C) absorption across the small intestine.
D) the kidneys.

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Approximately what percentage of those affected by osteoporosis are women?


A) 20
B) 45
C) 80
D) >90

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If Sharon were to become pregnant and have another baby,how would her calcium needs change throughout pregnancy and lactation?

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During pregnancy, Sharon's calcium needs...

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The matrix of bones is:


A) a protein framework.
B) made up primarily of collagen.
C) imbedded with hydroxyapatite.
D) All of these are correct.

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The most significant dietary factor contributing to osteoporosis is:


A) vitamin D.
B) calcium.
C) vitamin C.
D) protein.

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The group with the highest bone density is:


A) African Americans.
B) Asians.
C) Hispanics.
D) Non-Hispanic whites.

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Which of the following is NOT a major function of phosphorus in the body?


A) Contributor to bone and teeth structure
B) Constituent of DNA
C) pH balance
D) Regulating blood pressure

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Which is the FALSE statement about absorption of calcium?


A) Calcium absorption decreases during pregnancy.
B) Calcium supplements may interfere with absorption of copper and iron.
C) Lactose enhances the rate of calcium absorption.
D) Vitamin D enhances calcium absorption.

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Calcium absorption is highest in:


A) infancy.
B) young adults.
C) older adults.
D) after menopause.

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