Module 10

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Minerals

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Inorganic nutrients that are essential in the diet.

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Macrominerals

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Minerals present in greater amounts in the body, with a recommended intake of ≥100 mg per day.

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52 Terms

1

Minerals

Inorganic nutrients that are essential in the diet.

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2

Macrominerals

Minerals present in greater amounts in the body, with a recommended intake of ≥100 mg per day.

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3

Examples of macrominerals

Calcium, phosphorus, potassium, sulfur, sodium, chloride, and magnesium.

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4

Microminerals

Also called trace minerals, they have a recommended intake of <100 mg per day.

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5

Examples of microminerals

Iron, copper, manganese, and iodine.

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6

Calcium

The most abundant mineral in the body, primarily found in bones and teeth.

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7

Blood calcium regulation

Controlled by Vitamin D and parathyroid hormone.

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8

Hydroxyapatite

The crystal formed by calcium and phosphorus that provides bone strength.

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9

Functions of calcium

Muscle contraction, nerve impulse conduction, and blood clotting.

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10

Pre-eclampsia

A condition in pregnant women characterized by high blood pressure and protein in urine.

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11

Osteoporosis

A common bone disease leading to porous bones and an increased risk of fractures.

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12

Calcium absorption

Average absorption of calcium ingested is about 30%.

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13

RDA for calcium (adults 19–50 yrs.)

1,000 mg per day.

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14

Phosphorus

The second most abundant mineral in the body, primarily in bones and teeth.

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15

Key role of phosphorus

Part of bones and teeth, facilitates enzyme function, and component of ATP.

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16

RDA for phosphorus (adults)

700 mg per day.

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17

Magnesium

The macromineral found in the smallest amount in the body; ~35 g on average.

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18

RDA for magnesium (men)

400 mg per day.

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19

RDA for magnesium (women)

320 mg per day.

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20

Functions of zinc

Involved in immune function, DNA replication, antioxidant enzyme function, and wound healing.

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21

Signs of zinc deficiency

Limited growth, poor sexual development, abnormal hair/nails, and impaired immune function.

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22

Iron's primary role

Assists in the delivery of oxygen to tissues and cells.

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23

Iron deficiency anemia

A clinical condition caused by low iron stores, leading to too low hemoglobin levels.

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24

Heme iron

Iron form found in hemoglobin, primarily from meats and better absorbed.

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25

Non-heme iron

Elemental form of iron found in plant-based foods, less readily absorbed.

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26

RDA for iron (women 19-50 yrs.)

18 mg/day.

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27

RDA for iron (men and women over 50)

8 mg/day.

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28

Copper

A micromineral important for iron metabolism and antioxidant defenses.

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29

Copper absorption

50% of dietary copper is absorbed primarily in the small intestine.

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30

RDA for copper

900 µg per day.

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31

Selenium

An essential mineral that supports the body’s antioxidant defense system.

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32

Role of selenium

Part of the antioxidant enzyme glutathione peroxidase.

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RDA for selenium

55 µg per day.

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34

Iodine's primary function

Facilitates the production of thyroid hormone that controls metabolism.

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35

Iodine deficiency effects

Can lead to the enlargement of the thyroid gland (goiter) and developmental delays.

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36

RDA for iodine

150 µg per day.

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37

Calcium's effect on muscle contraction

Calcium enters muscle cells to initiate contraction.

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38

Calcium's role in the nervous system

Regulates the release of neurotransmitters.

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39

Factors decreasing calcium absorption

Phytates and oxalates found in some plant foods.

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40

Calcium sources

Dairy products, canned sardines, broccoli, and green leafy vegetables.

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41

Phosphorus food sources

Meat, fish, poultry, eggs, and dairy products.

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42

Magnesium food sources

Green leafy vegetables, nuts, legumes, and whole grains.

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43

Sulfur's storage site

Primarily in amino acids methionine and cysteine.

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44

Iron toxicity symptoms

Abdominal pain, fatigue, and potential liver damage.

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45

Zinc food sources

Meat, poultry, nuts, and whole grains.

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46

Copper food sources

Organ meats, shellfish, chocolate, and nuts.

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47

Selenium food sources

Seafood, Brazil nuts, meats, eggs, and wheat.

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48

Iodine food sources

Seafood and iodized salt.

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49

Major organ responses to low blood calcium

Intestine, bones, and kidneys.

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50

Calcium's alternate functions

Plays a role in blood clotting and may protect against hypertension.

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51

Osteopenia

Condition of weakened bones, precursor to osteoporosis.

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Calcium's role in hormone regulation

Influences cellular calcium levels affecting hormone action.

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