Nutrition: Chapter 7 & 8

25 July 2022
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question
Fifty to ________ percent of an adult's healthy body weight is fluid
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70
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What is the function of synovial fluid?
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lubricates body joints
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Which is NOT a symptom of low blood pressure?
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stroke
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Water has a high heat capacity. What does this term mean?
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Water is resistant to changes in temperature.
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Water is known as the universal solvent. This means that
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most solutes (particles) will dissolve in water
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Which of the following statements is TRUE?
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Water freely moves across cell membranes.
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Which of the following will likely result if the concentration of electrolytes outside the cell is higher than in the intracellular environment?
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The cell will shrink and dry up.
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Ian is hospitalized for dehydration after experiencing severe vomiting and diarrhea. Which of the following is NOT associated with Ian's dehydrated condition?
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The extracellular electrolyte concentration will be very low
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What is the primary reason we sweat?
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regulate body temperature
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Most water is lost daily via the
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kidneys
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The ability of a muscle to contract and relax is dependent on the flow of ________ in and out of the muscle cell
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calcium
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The "command center" of fluid intake is located in the ________
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hypothalamus
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Which of the following stimulates the thirst mechanism
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decreased concentration of solutes in the blood
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Insensible water loss includes water loss
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through respiration
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Which of the following is a major mineral?
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sodium
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Hyponatremia is associated with
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overhydration
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Diets high in sodium are associated with
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high blood pressure
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Matt has just been diagnosed with hypertension, and his physician has instructed him to reduce his sodium intake. Which of the following would be good advice for Matt?
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Snack on fresh fruits and vegetables instead of salty snacks.
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The water that comes from lakes, rivers, and reservoirs is ________ water
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surface
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Diets rich in ________ are associated with maintaining healthy blood pressure levels.
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potassium
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Which of the following individuals is at risk for hyperkalemia
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an individual with kidney disease
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The majority of dietary chloride is consumed from
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table salt
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Which is NOT a function of chloride
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used in public water supplies to kill harmful bacteria
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The majority of our body's phosphorus is stored in the
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bones
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Widely distributed in many foods, phosphorous is especially abundant in foods dense in
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protein
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Mary drinks 600 milliliters of water. How many cups is this equivalent to?
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2 1/2 cups
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On average, which of the following individuals would have the highest percentage of body water?
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35-year-old lean man
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Which of the following statements is FALSE regarding phosphorus?
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On average, Americans do not consume enough phosphorus in their diets.
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Which of the following foods contains the lowest amount of sodium
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1 medium fresh orange
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Which of the following is a diuretic
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alcohol
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All of the following are major functions of sodium EXCEPT
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maintains normal heart rhythm
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Which of the following do sodium and potassium NOT have in common?
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Rich sources of both include fresh foods, such as bananas, cantaloupe, and potatoes
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All of the following conditions are related to an electrolyte imbalance EXCEPT
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hypoglycemia.
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The fluid that is found in between cells is called
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interstitial
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Which of the following does NOT describe tissue fluid?
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fluid that is found in the blood stream
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Which of the following is NOT a mechanism to maintain the body's internal temperature?
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Warmed fluids from the body's surface return to the body's core, thus heating the body
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The movement of water through a semipermeable membrane toward solutes is called
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osmosis
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Which of the following conditions would result in a decreased water loss from the body
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high sodium intake
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The two electrolytes that enable nerves to respond to stimuli are sodium and
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potassium
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Of the following ethnic groups, which has the highest risk of developing hypertension
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African American
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The agency that sets and monitors standards for city water systems is the
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Environmental Protection Agency (EPA).
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Between 50-70% of an adult's body weight is comprised of fluid.
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TRUE
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Lean tissue contains a lower percentage of fluid compared with fat tissue.
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FALSE
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Typically, water moves from areas of low concentration of solutes toward areas of higher concentration of solutes
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TRUE
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Fluids move freely in and out of cells
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TRUE
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The thirst mechanism is highly sensitive and responsive to changes in fluid balance, especially as we age
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FALSE
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Drinking eight glasses of fluid each day ensures that all healthy adults will meet their fluid needs.
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FALSE
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Sodium is an essential nutrient necessary for human health.
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TRUE
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Most Americans exceed the dietary recommendations for sodium.
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TRUE
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Processed foods tend to be low in sodium and high in potassium.
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FALSE
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Fruits and vegetables are rich sources of potassium
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TRUE
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Lean individuals have a higher percentage of body water than obese individuals
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TRUE
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Individuals taking diuretics should always increase their dietary potassium intake.
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FALSE
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Sodium and chloride are the predominant electrolytes in the extracellular fluid
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TRUE
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Extreme dehydration, vomiting, and diarrhea can result in hypokalemia
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TRUE
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Bottled water is safer to drink than tap water
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FALSE
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Eating too much sodium will result in hypernatremia in most healthy individuals
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FALSE
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A diet rich in potassium has been shown to help maintain a healthy blood pressure
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TRUE
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Individuals with hypertension should limit their dietary sodium intake to less than 1.5 grams a day.
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TRUE
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Limiting salt consumption improves blood pressure in some individuals with hypertension
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TRUE
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The smallest physical units of a substance are
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molecules
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Carbon and hydrogen are two examples of
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atoms
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In an atom, the nucleus has a positive charge, and the electrons orbiting around the nucleus have a ________ charge
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negative
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A chemical reaction in which atoms lose electrons is
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oxidation
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) Which of the following statements is FALSE regarding free radicals?
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Our body has no mechanism to combat free radicals
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What is an exchange reaction
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a two-part metabolic reaction that involves a loss and gain of electrons
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Free radicals
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are formed by exposure to air pollution and tobacco smoke
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Which of the following are required components of antioxidant enzyme systems
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antioxidant minerals
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How do antioxidant minerals stabilize free radicals
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break down and convert them to less damaging molecules
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Which of the following diseases has NOT been linked to free radical damage
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type 1 diabetes
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Examples of antioxidant enzyme systems include superoxide dismutase, ________, and glutathione peroxidase
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catalase
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The most powerful and abundant form of vitamin E is
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alpha-tocopherol (vitamin E emery is the alpha)
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Which water-soluble vitamin can regenerate vitamin E after it has been oxidized
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vitamin C
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Grandma Jane takes anticoagulant medication daily to prevent blood clots. Which vitamin must she avoid taking in excess of the RDA, as it could interact with the medication causing uncontrollable bleeding?
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vitamin E
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About 90% of vitamin E is stored in
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adipose tissue
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Which of the following is NOT a function of vitamin E?
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improving the absorption of vitamin C if dietary intake is low
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Which of the following foods are the richest sources of vitamin E
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mayonnaise, vegetable oils, nuts, and seeds
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Taking vitamin E supplements along with ________ can cause uncontrollable bleeding
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anticoagulants
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A deficiency of ________ can result in erythrocyte hemolysis, leading to anemia.
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vitamin E
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Which of the following nutrients requires the most frequent consumption to assure adequate body stores?
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vitamin C
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The deficiency disease associated with vitamin C is
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scurvy
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Which of the following statements is FALSE concerning vitamin C?
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Smokers should consume less vitamin C than non-smokers
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The doctor has recently told Julie that she is anemic. Julie should consume ________ with her iron supplement to increase its absorption.
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a glass of orange juice
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Which of the following increases the RDA for vitamin C?
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smoking cigarettes
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Which of the following cooking methods will likely destroy the most vitamin C in food?
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boiling
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Which of the following are rich sources of vitamin C
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green and red peppers
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All of the following are good sources of vitamin C EXCEPT
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milk
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Consuming even moderately excessive doses of vitamin C supplements would be most harmful to individuals suffering from
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hemochromatosis
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Symptoms of a vitamin C deficiency include
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bleeding gums and loose teeth
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Beta-carotene is a precursor of
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Retinol
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Which of the following is FALSE concerning carotenoids?
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Beta-carotene is the only carotenoid that functions as an antioxidant
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Most of the body's vitamin A is stored in the
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liver
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The most critical role that vitamin A plays in the human body is
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maintaining healthy vision
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The light sensitive pigment found in rod cells formed by retinal and opsin is
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rhodopsin
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Which of the following foods would be the best dietary source of preformed vitamin A
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egg
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Both Keshan disease and Kashin-Beck disease are associated with a ________ deficiency
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selenium
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Which of the following hormones requires selenium for its synthesis?
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thyroxine
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Where does the body store selenium
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in amino acids in the body
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Diseases that cause the malabsorption of fat can result in a deficiency of
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vitamin A
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Which mineral can function as an antioxidant
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selenium
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The nucleus of the atom has a positive charge
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TRUE
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Free radicals are highly unstable atoms that can damage or destroy cells, often resulting in a loss of normal cellular function.
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TRUE
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All antioxidants are water soluble.
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FALSE
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Antioxidants must be consumed in our diet because our bodies cannot make them
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TRUE
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The majority of the vitamin E in our bodies is found in our adipose tissue
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TRUE
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Frying decreases the amount of vitamin E in vegetable oil.
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TRUE
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In some people, long-term use of standard vitamin E supplements has been associated with hemorrhagic stroke caused by bleeding in the brain
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TRUE
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Vitamin C is not stored in the body and must be consumed frequently
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TRUE
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Scurvy is the deficiency disease associated with inadequate vitamin C intake
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TRUE
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Diseases that cause malabsorption of fat can result in a vitamin C deficiency
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FALSE
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As beta carotene is not considered a nutrient, no RDA has been established.
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TRUE
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Carotenosis is a serious side effect of consuming too much beta-carotene that can be fatal if untreated.
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FALSE
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Cooking foods high in carotenoids improves their bioavailability. Answer
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TRUE
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Carrots, spinach, and sweet potatoes contain a large amount of preformed vitamin A.
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FALSE
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As vitamin A is fat-soluble, supplements of the nutrient can be highly toxic.
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TRUE
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Selenium toxicity occurs from an overconsumption of foods rich in this mineral.
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FALSE
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Selenium is the only mineral with a known antioxidant function
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FALSE
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Selenium is found only in animal products.
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FALSE
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Toxicity symptoms of vitamin A include birth defects, spontaneous abortion, blurred vision, and liver damage.
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TRUE
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Vitamin A deficiency is a severe public health concern in developing nations, often resulting in blindness and death due to infection.
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TRUE