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Flashcards in 560C Vit and Min Deck (339)
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241

Which two of the following are the most common initial blood measurements used for the assessment of iron nutriture?

hematocrit and hemoglobin

242

Indicate the two erythrocyte characteristics associated with iron-deficiency anemia.

hypochromic and microcytic

243

Which 3 of the following foods are the best sources of zinc?

2. Red meat
3. Seafood
5. Leafy vegetables

244

Which 3 of the following foods are the best sources of copper?

1. Dried fruit
3. Nuts
4. Shellfish

245

Phytate and oxalate inhibit zinc absorption by providing binding sites in the form of ____________.

Oxygen

246

Inhibition of zinc absorption by phytate can be reduced by what process?

3. Fermentation

247

T/F: High intake of vitamin C increases the absorption of copper.

FALSE (it increases iron)

248

T/F: Thionein polypeptides produced in response to zinc intake, have a higher affinity for copper than for zinc itself.

TRUE

249

the following are functions of _____

Facilitates liver storage of zinc and copper
Intracellular binding ligand for copper
Intracellular binding ligand for zinc
Impairs absorption of excessive dietary copper
Scavenges superoxide and hydroxyl radicals

metallothionein.

250

function of _____ (a protein made in the liver).

Antioxidant
Oxidative enzyme
Copper transporter

ceruloplasmin

251

T/F: Zinc and copper are equally important for the activity of cytosol superoxide dismutase (SOD).

False


Cu regulates functional expression

252

T/F: Growth delays attributable to zinc insufficiency have only been documented in developing countries.

FALSE

253

T/F: In general, shellfish and red or dark meats are more reliable sources of zinc than are foods of plant origin.

TRUE

254

According to the LPI Zinc article, which of the following is the most correct statement?

1. Intranasal zinc has been found beneficial against the common cold in most studies, but has some evidence of causing harm
2. Intranasal zinc has been found not beneficial against the common cold in most studies, but has no evidence of causing harm
3. Intranasal zinc has been found not beneficial against the common cold in most studies, and has some evidence of causing harm
4. Intranasal zinc has been found beneficial against the common cold in most studies, and has no evidence of causing harm

3.Intranasal zinc has been found not beneficial against the common cold in most studies, and has some evidence of causing harm

255

Which of the following statements is false?

1. Both organic and inorganic forms of selenium are present in food
2. Selenium-dependent deiodinases may either activate thyroid hormone or may deactivate it.
3. Phytic acid appears to inhibit absorption of both chromium and selenium
4. All forms of glutathione peroxidase are selenium-dependent.
5. Animal products are generally considered better sources of selenium than plant products.

4. All forms of glutathione peroxidase are selenium-dependent.

256

Which form of 1) organic and 2) inorganic selenium is best absorbed from the gastrointestinal tract?

selenomethionine
selenate

257

Which selenium-containing molecule is thought to participate in the regeneration of several antioxidant systems, possibly including vitamin C?

Thioredoxin reductase

258

Match the statements with the appropriate disease(s).

Keshan disease, Keshan disease, Both Keshan and Kashin-Beck disease

Associated with regional selenium deficiency in China
Symptoms include cardiomyopathy
Symptoms include degeneration of joints and cartilage
Selenium deficiency is not likely the only causative factor

Both Keshan and Kashin-Beck disease
Keshan disease

Kashin-Beck disease

Both Keshan and Kashin-Beck disease

259

According to the LPI article, which method was used to establish recommendations for selenium intake in the U.S.?

1. Balance studies of selenium intake and excretion
2. Minimum intake required to prevent deficiency symptoms
3. Repletion studies of selenium-deficient men
4. Amount required to maximize plasma glutathione peroxidase activity

4. Amount required to maximize plasma glutathione peroxidase activity

260

What is the Tolerable Upper Intake Level set for safe selenium intake?

400 mcg

261

T or F: Toanail Se and plasma glutathione peroxidase activity are two unique approaches used to assess selenium status, but seldom used to assess the status of other nutrients.

TRUE

262

Which population group appears most at risk for inadequate chromium intake or low tissue levels?

Elderly

263

Match the statements with the appropriate trace mineral. Chromium, Selenium
1. Substitutes for sulfur in amino acids
2. Trivalent form is most important in humans
3. High content in natural brewers yeast
4. Transported in the blood bound to transferrin

Selenium
Chromium
Chromium
Chromium

264

The following are proposed mechanisms for the function of______ in glucose tolerance?
1. Increase glucose uptake into cells
3. Increase pancreatic insulin secretion
4. Regulate insulin receptor function

chromium

265

proposed influence of _____ in the body?

1. Insulin potentiation
3. Gene expression
4. RNA synthesis

chromium

266

Which vitamin enhances chromium absorption?

Vit C

267

Consumption of diets high in ________ increases urinary chromium losses in contrast to diets that are high in ________.

simple sugars
complex carbs

268

A mild chromium deficiency shares all of the following characteristics of the insulin resistance syndrome (Syndrome X, Metabolic Syndrome) (3)

2. Hyperinsulinemia
3. Insulin resistance
4. Elevated plasma glucose

269

Which method was used to establish recommendations for chromium intake in the U.S.?

Chromium intake in normal diet

270

What is a serious adverse reaction reported in some individuals taking large amounts of chromium picolinate?

Kidney failure