Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
122 Cards in this Set
- Front
- Back
Match the following characteristics with the appropriate mineral.
Calcium, Magnesium, Phosphorus
|
|
|
Match the following characteristics with the appropriate mineral. Calcium, Magnesium, Phosphorus
|
|
|
Match the following characteristics with the appropriate mineral: Calcium, Phosphorus, Magnesium
|
|
|
Which of the following is the most concentrated form of calcium?
|
1. carbonate |
|
T/F:Calcium absorption in adults is typically less than 50%, whether from food or supplements. |
True |
|
The binding protein that regulates many of the calcium-dependent enzymes is ___________ |
Calmadulin |
|
Which of the following has the least absorbable calcium in a typical serving?
|
2. Spinach |
|
What is found in bran and legumes and will, in large amounts, have a detrimental effect upon absorption of minerals such as calcium? |
Phytate/Phytic acid |
|
Which statement is most true regarding the effect of calcium supplements on iron absorption.
|
2. Calcium supplements can inhibit the absorption of iron, but the effect is likely temporary |
|
Which of the following is the most reliable method for measuring calcium status?
|
2. bone mass measurements |
|
When in the lifecycle does the attainment of peak bone mass typically occur? |
young adulthood |
|
What is the most frequent site of fracture due to osteoporosis? |
hip |
|
Phosphate balance is achieved largely by _____. |
Renal excretion |
|
T/F: An extra 2.3 grams of daily sodium intake appears to have a more significant effect on urinary calcium excretion than does an extra 300-400 mg of caffeine intake. |
True |
|
T/F: A diet high in fruits and vegetables may help prevent bone loss and osteoporosis by increasing the dietary acid load. |
False |
|
Which mineral participates in more than 300 enzyme systems? |
Magnesium |
|
T/F: In muscle contraction, the roles of calcium and magnesium are antagonistic, with magnesium promoting contraction and calcium being the inhibitor. |
False |
|
Which statement is false?
|
False: Magnesium metabolism is regulated by several hormones. |
|
Which of the following is false?
|
False: Magnesium can activate the Ca-ATPase pump to increase intracellular calcium |
|
T/F: Supplementation with large amounts of magnesium may lead to adverse effects when impaired kidney function exists. |
True |
|
Which organs are responsible for regulation of extracellular water osmolarity and volume? |
hypothalamus and kidney |
|
Which hormone, stimulated by increased blood pressure stretching the heart, functions to inhibit sodium reabsorption to promote sodium excretion? |
Atrial natriuretic peptide |
|
A clinically useful parameter in establishing metabolic disorders that can alter electrolyte balance is:
|
anion gap |
|
Match the electrolyte with the appropriate description: Sodium, Potassium, Chloride
|
|
|
The salt intake of an individual whose dietary sodium intake is 2000 mg per day is: |
5000 mg Sodium X 2.5 = Salt |
|
What percentage of total sodium intake is contributed by salt added during cooking and at the table? |
15% |
|
What percentage of total sodium intake is contributed by salt added to processed foods? |
75% |
|
A food may be labeled “low sodium” if each serving provides less than _______ per serving. |
140mg |
|
T/F:Less than 85% of either ingested sodium or ingested potassium is absorbed from the gastrointestinal tract. |
false |
|
T/F: Gastrointestinal absorption of sodium is dependent upon a single biological pathway. |
false |
|
While all of the following affect blood volume and blood pressure, one of them is not part of a specific coordinated system of biochemical interactions. Which one?
|
3. Anti-diuretic hormone |
|
T/F:Aldosterone promotes the excretion of sodium and reabsorption of potassium. |
False conservation of sodium, secretion of potassium, increase in water retention |
|
Which one of the following is not suspected to increase the risk of gastric cancer?
|
1. low protein intake |
|
Chloride contributes significantly to which of the following functions?
|
3. gastric acidity |
|
In terms of physiological function, acid-base balance refers to:
|
2. the control of the hydrogen ion concentration in body fluids |
|
Which of the physiological buffers has the most potent buffering capacity?
|
4. protein |
|
Hypokalemia may occur as the result of which of the following?
|
4. prolonged diarrhea |
|
T/F: Potassium decreases urinary calcium excretion while sodium increases it. |
True |
|
T/F: A high potassium diet may decrease the risk of kidney stones by increasing the dietary acid load. |
False |
|
Which of the following macrominerals has NOT been associated with the control of blood pressure?
|
2. phsphorus |
|
According to the Perspective at the end of chapter 12 in our text, research has shown that supplements of which mineral are associated with significant reductions in both systolic and diastolic blood pressure, especially in individuals with hypertension? |
potassium |
|
T/F: All hypertensive individuals experience a rise in blood pressure with higher salt intake. |
False |
|
T/F:Hypertensive individuals taking antihypertensive medications are likely to benefit from sodium restriction. |
True |
|
What is the most important physiological defense against overheating? |
evaporation |
|
Which of the following macrominerals is NOT typically present in sweat?
|
5. Phosphorus |
|
Which of the following is an emerging concern in situations of very long endurance exercise events?
|
|
|
Dehydration equivalent to what percentage of body weight can impair endurance performance? |
2% |
|
According to the Perspective at the end of chapter 12 in our text, which of the following is true?
|
True: Typical sports drinks facilitate rapid absorption of water |
|
Match the iron-containing molecule with the most appropriate description. Ferritin, Hemosiderin, Myoglobin, Transferrin, Hemoglobin, Divalent Mineral Transporter 1
|
|
|
Which of the following foods contain the least amount of iron?
|
3. Dairy products |
|
Which three iron forms are used for food fortification? |
Elemental iron, ferrous, ferric |
|
Which vitamin specifically promotes gastrointestinal iron absorption? |
Vit C |
|
Indicate the two beverages containing polyphenols and/or oxalates that most strongly inhibit iron absorption. |
Coffee and Tea |
|
What is the function of a chelator in iron nutrition? |
Enhance or inhibit absorption or bound non-heme iron |
|
produced by the liver when iron stores are high and released to the blood to act at the surface of enterocytes and macrophages. |
hepcidin |
|
Match the description with the primary oxidation state iron possesses in that situation: Ferric iron, Ferrous iron.
|
|
|
Which mineral is critical for oxidizing iron to be bound by transferrin for delivery to the tissues from the gut and liver? |
Copper |
|
Which one of the following enzymatic processes does not require iron?
|
FA synthasis |
|
Which of the following is NOT a function of a heme-containing compound or enzyme?
|
4. Support of energy metabolism via NADH dehydrogenase and succinate dehydrogenase enzymes |
|
3 vitamins/minerals required for heme synthesis: |
B6, Zn, Fe |
|
Which of the following is a group not considered at high risk for iron deficiency compared to the others?
|
2. Post-menopausal women |
|
Indicate the three correct statements regarding hereditary hemochromatosis.
|
2. Begins around 20 years of age 3. Seen most often in adult Caucasians 6. Associated with tissue damage |
|
Which of the following is false?
|
|
|
All of the following tend to increase as iron depletion becomes more severe in an otherwise healthy individual EXCEPT?
|
Plasma ferritin |
|
Which two of the following are the most common initial blood measurements used for the assessment of iron nutriture?
|
hematocrit and hemoglobin |
|
Indicate the two erythrocyte characteristics associated with iron-deficiency anemia. |
hypochromic and microcytic |
|
Which TWO of the following foods are the poorest sources of zinc?
|
1. Refined grains/cereals 4. Fruit |
|
Which TWO of the following foods are the poorest sources of copper?
|
2. vegetables 5. refined grains |
|
Phytate and oxalate inhibit zinc absorption by providing binding sites in the form of ____________. |
Oxygen |
|
Inhibition of zinc absorption by phytate can be reduced by what process?
|
3. Fermentation |
|
T/F: High intake of vitamin C increases the absorption of copper. |
False |
|
Match the characteristics with the appropriate mineral(s). Zinc, Copper, Both Zn & Cu
|
|
|
T/F: Thionein polypeptides produced in response to zinc intake, have a higher affinity for copper than for zinc itself. |
True |
|
Which one of the following is NOT a function of metallothionein.
|
4. Transporter of zinc and copper in the serum |
|
Which one of the following is NOT a function of ceruloplasmin.
|
4. zinc transporter |
|
T/F: Zinc and copper are equally important for the activity of cytosol superoxide dismutase (SOD). |
False Cu regulates functional expression |
|
Match the metabolic function with the correct micromineral. Copper, Zinc
|
|
|
T/F: Growth delays attributable to zinc insufficiency have only been documented in developing countries. |
False |
|
T/F: In general, shellfish and red or dark meats are more reliable sources of zinc than are foods of plant origin. |
True |
|
T/F: According to recent national surveys in the US described in the LPI articles, the average dietary intakes of both zinc and copper are below current Recommended Dietary Allowances for these minerals. |
False |
|
According to the LPI Zinc article, which of the following is the most correct statement?
|
3.Intranasal zinc has been found not beneficial against the common cold in most studies, and has some evidence of causing harm |
|
Which of the following statements is false?
|
4. All forms of glutathione peroxidase are selenium-dependent. |
|
Which form of 1) organic and 2) inorganic selenium is best absorbed from the gastrointestinal tract? |
|
|
Which selenium-containing molecule is thought to participate in the regeneration of several antioxidant systems, possibly including vitamin C? |
Thioredoxin reductase |
|
Match the statements with the appropriate disease(s). Keshan disease, Keshan disease, Both Keshan and Kashin-Beck disease
|
|
|
According to the LPI article, which method was used to establish recommendations for selenium intake in the U.S.?
|
4. Amount required to maximize plasma glutathione peroxidase activity |
|
What is the Tolerable Upper Intake Level set for safe selenium intake? |
400 mcg |
|
What are TWO unique approaches used to assess selenium status, but seldom used to assess the status of other nutrients? |
Toanail Se and plasma glutathione peroxidase activity |
|
Which population group appears most at risk for inadequate chromium intake or low tissue levels? |
Elderly |
|
Match the statements with the appropriate trace mineral. Chromium, Selenium
|
|
|
Which of the following is NOT a proposed mechanism for the function of chromium in glucose tolerance?
|
2. Decrease gastrointestinal absorption of glucose |
|
Which one of the following is not a proposed influence of chromium in the body?
|
2. Antioxidant |
|
Which vitamin enhances chromium absorption? |
Vit C |
|
Consumption of diets high in ____1____ increases urinary chromium losses in contrast to diets that are high in ____2____. |
|
|
A mild chromium deficiency shares all of the following characteristics of the insulin resistance syndrome (Syndrome X, Metabolic Syndrome) except for which one?
|
1. Peripheral neuropathy |
|
Which method was used to establish recommendations for chromium intake in the U.S.? |
Chromium intake in normal diet |
|
What is a serious adverse reaction reported in some individuals taking large amounts of chromium picolinate? |
Kidney failure |
|
How many atoms of iodine are found on the most physiologically-active form of thyroid hormone? |
three (T3) |
|
T/F:While cretinism specifically refers to the consequences of maternal iodine deficiency, the severe neurological symptoms of cretinism appear only in the infant, not the mother. |
True |
|
Indicate all of the following that are classified as goitrogens.
|
1. Cabbage family vegetables 3. Lithium |
|
Iodine is added to what dietary component in order to help prevent iodine deficiency? |
Salt |
|
T/F: Excessive supplementation with iodine can result in hypothyroidism. |
True |
|
Which of the following is the poorest source of fluoride?
|
1.Dairy |
|
Which categories of food provide the most nickel?
|
3. Nuts, legumes, grains |
|
Which of the following groups of foods are richest in boron, providing 1.0 to 4.5 mg/100 g?
|
3. raisins, legumes, nuts, and avocados |
|
The richest dietary sources of vanadium are _____.
|
2.cereal and grain products |
|
What foods are rich sources of silicon?
|
|
|
Which of the following can be considered essential for normal function of brain, bone, and liver?
|
3. Manganese |
|
Match the micronutrients with the appropriate biological function. Arsenic, Molybdenum, Silicon, Vanadium
|
|
|
Match the trace elements with the biomolecules they are either functionally or therapeutically associated with: Arsenic, Cobalt, Flouride, Manganese
|
|
|
Which micromineral serves as a cofactor for xanthine oxidase in the metabolism of purines, pyrimidines, and pteridines? |
Myobddnum |
|
Which trace element competes with iron for intestinal absorption on divalent mineral transporter 1 (DMT1)? |
Nickle |
|
For which TWO minerals may nickel be an effective (not an antagonistic) substitute in some enzyme systems? |
Zinc and Magnesium |
|
Which method was used to establish Adequate Intake recommendations for manganese?
|
3. Median manganese intake in typical American diets |
|
A dietary supplement containing manganese at levels over twice the adult UL was shown in two studies to be effective for treating _______________. However, it is impossible to say whether manganese itself was responsible for any of this effectiveness. |
Osteoarthritis |
|
T/F: norganic forms of arsenic are more toxic than are organic forms of the element. |
True |
|
T/F: Chronic exposure to excessive arsenic could be detected reliably with hair analysis. |
True |
|
Boron is associated with which of the following functions?
|
2. bone development and mediation of the inflammatory response |
|
Which mineral may substitute for magnesium in the complement system? |
Nickle |
|
Concern exists over the amount of manganese in some supplements due to the possibility of toxic reactions in which body system? |
Neurological |
|
Match the trace element with the sign or symptom resulting from overingestion. Arsenic, Fluoride, Molybdenum, Silicon, Vanadium
|
|
|
Bluish skin and nails that result from ingestion of silver over a period of time are called _____. |
Argryia |