NDFS 100 EXAM 3 BYU QUESTIONS & ANSWERS
What are the major roles of water? - Answer -Transports nutrients; dissolves amino
acids, glucose, minerals, etc. to be excreted; coolant; cleansing agent.
What factors increase fluid needs? - Answer -Alcohol; cold weather; breastfeeding &
pregnancy; surgery, blood loss, burns, medications, etc; children; elderly; certain
diseases; forced air environments -- airplanes, sealed buildings, etc.
Hard water is high in what? - Answer -Calcium and magnesium
Soft water is high in what? - Answer -Sodium
What foods can be sources of water? - Answer -Celery and lettuce
What are examples of surface water? - Answer -Lakes, rivers, reservoirs
What are surface waters exposed to? - Answer -Acid rain and pollution
What things can remove contaminants from surface water? - Answer -Plants,
microorganisms, and sunlight
What can ground water be contaminated by? - Answer -hazardous waste, dumps, oil
and gas pipelines, sewage
Where is ground water found? - Answer -Underground
What type of water takes longer to decontaminate? - Answer -Groundwater
What is the main function of magnesium? - Answer -Assists more than 300 enzymes
What are other functions of magnesium? - Answer -Muscle function, bone
mineralization
What are magnesium food sources? - Answer -Nuts, legumes, seafood, dark green
foods, dark chocolate
What are the functions of sodium? - Answer -Muscle contraction, fluid balance, nerve
transmission, acid-base (pH) balance
What are sodium food sources? - Answer -Salt, processed (fast) food, condiments and
seasonings
What are sodium toxicities? - Answer -Hypertension (high blood pressure), increased
risk for heart disease and stroke.
, What is the main function of potassium? - Answer -Muscle contractions
What are other functions of potassium? - Answer -Fluid & electrolyte balance,
maintaining steady heartbeat
What are potassium food sources? - Answer -Fruits and vegetables
What is the main function of iodine? - Answer -Thyroid regulation
What is the other function of iodine? - Answer -Metabolic rate
What are iodine food sources? - Answer -Seafood, fast food, baked food, milk, salt and
sea salt (if iodized)
What are iodine deficiencies? - Answer -Goiter (thyroid neck growths) stunted physical
and mental growth
What is the function of iron? - Answer -Hemoglobin & myoglobin
What are food sources of heme iron? - Answer -Animal Meat (red)
Which iron is easily absorbed? - Answer -Heme iron
Where is non-heme iron found? - Answer -All foods other than meat
Which type of iron is NOT easily absorbed? - Answer -Non-heme iron
What helps iron absorption? - Answer -Vitamin C
What is the main function of calcium? - Answer -Strong bones and teeth
What are other functions of calcium? - Answer -Nerve transmission, blood pressure &
clotting, muscle contraction
What are calcium food sources? - Answer -Dairy, green vegetables
What are calcium toxicities? - Answer -Constipation, lowered absorption of other
minerals (especially Iron), kidney stones
What is iron-deficiency called? - Answer -Anemia
What inhibits iron absorption? - Answer -Coffee, tea, milk (Tannins, phytates, & fiber)
What are iron toxicities? - Answer -Hemochromatosis: increased iron absorption
What are the major roles of water? - Answer -Transports nutrients; dissolves amino
acids, glucose, minerals, etc. to be excreted; coolant; cleansing agent.
What factors increase fluid needs? - Answer -Alcohol; cold weather; breastfeeding &
pregnancy; surgery, blood loss, burns, medications, etc; children; elderly; certain
diseases; forced air environments -- airplanes, sealed buildings, etc.
Hard water is high in what? - Answer -Calcium and magnesium
Soft water is high in what? - Answer -Sodium
What foods can be sources of water? - Answer -Celery and lettuce
What are examples of surface water? - Answer -Lakes, rivers, reservoirs
What are surface waters exposed to? - Answer -Acid rain and pollution
What things can remove contaminants from surface water? - Answer -Plants,
microorganisms, and sunlight
What can ground water be contaminated by? - Answer -hazardous waste, dumps, oil
and gas pipelines, sewage
Where is ground water found? - Answer -Underground
What type of water takes longer to decontaminate? - Answer -Groundwater
What is the main function of magnesium? - Answer -Assists more than 300 enzymes
What are other functions of magnesium? - Answer -Muscle function, bone
mineralization
What are magnesium food sources? - Answer -Nuts, legumes, seafood, dark green
foods, dark chocolate
What are the functions of sodium? - Answer -Muscle contraction, fluid balance, nerve
transmission, acid-base (pH) balance
What are sodium food sources? - Answer -Salt, processed (fast) food, condiments and
seasonings
What are sodium toxicities? - Answer -Hypertension (high blood pressure), increased
risk for heart disease and stroke.
, What is the main function of potassium? - Answer -Muscle contractions
What are other functions of potassium? - Answer -Fluid & electrolyte balance,
maintaining steady heartbeat
What are potassium food sources? - Answer -Fruits and vegetables
What is the main function of iodine? - Answer -Thyroid regulation
What is the other function of iodine? - Answer -Metabolic rate
What are iodine food sources? - Answer -Seafood, fast food, baked food, milk, salt and
sea salt (if iodized)
What are iodine deficiencies? - Answer -Goiter (thyroid neck growths) stunted physical
and mental growth
What is the function of iron? - Answer -Hemoglobin & myoglobin
What are food sources of heme iron? - Answer -Animal Meat (red)
Which iron is easily absorbed? - Answer -Heme iron
Where is non-heme iron found? - Answer -All foods other than meat
Which type of iron is NOT easily absorbed? - Answer -Non-heme iron
What helps iron absorption? - Answer -Vitamin C
What is the main function of calcium? - Answer -Strong bones and teeth
What are other functions of calcium? - Answer -Nerve transmission, blood pressure &
clotting, muscle contraction
What are calcium food sources? - Answer -Dairy, green vegetables
What are calcium toxicities? - Answer -Constipation, lowered absorption of other
minerals (especially Iron), kidney stones
What is iron-deficiency called? - Answer -Anemia
What inhibits iron absorption? - Answer -Coffee, tea, milk (Tannins, phytates, & fiber)
What are iron toxicities? - Answer -Hemochromatosis: increased iron absorption
