Nutrition and Vitamins Quiz

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Questions and Answers

What is the recommended daily allowance (RDA) for adults for vitamin E?

  • 25 mg
  • 10 mg
  • 15 mg (correct)
  • 20 mg

Which of the following is NOT a good source of vitamin E?

  • Fish (correct)
  • Fortified cereals
  • Margarines
  • Nuts and seeds

What is the upper limit (UL) for vitamin E intake per day?

  • 1,500 mg
  • 2,000 mg
  • 500 mg
  • 1,000 mg (correct)

Which trace mineral aids in activating thyroid hormones?

<p>Selenium (D)</p> Signup and view all the answers

Which food is an excellent source of selenium?

<p>Brazil nuts (D)</p> Signup and view all the answers

What adverse effect can excessive vitamin E have when taken with anticoagulant medications?

<p>Prolonged bleeding (C)</p> Signup and view all the answers

How is selenium primarily obtained from dietary sources?

<p>From soil-rich animal and plant sources (A)</p> Signup and view all the answers

Which of the following symptoms is NOT associated with selenium deficiency?

<p>Nausea (A)</p> Signup and view all the answers

Which of the following phytochemicals are known for their antibacterial or antiviral properties?

<p>Polyphenols (C)</p> Signup and view all the answers

What dietary patterns are associated with chronic, low levels of inflammation?

<p>High sugar and processed food intake (B)</p> Signup and view all the answers

What is one of the main roles of probiotics and prebiotics in the immune system?

<p>They are linked to prevention and treatment of various infections. (C)</p> Signup and view all the answers

What role does vitamin C play in the immune system?

<p>It assists in the production of antibodies. (B)</p> Signup and view all the answers

What is achieved when calories consumed match the amount of energy expended?

<p>Energy equilibrium (D)</p> Signup and view all the answers

What is a defining characteristic of the human gut microbiota at birth?

<p>It is initially sterile. (D)</p> Signup and view all the answers

Which of the following stages of life is positive energy balance desired?

<p>Infancy (C)</p> Signup and view all the answers

Which of the following statements about prebiotic and probiotic supplementation is true?

<p>They can cause infections in people with compromised immune systems. (D)</p> Signup and view all the answers

Which type of bacteria is specifically linked to the fermentation of dairy products?

<p>Lactic acid bacteria (D)</p> Signup and view all the answers

What primarily contributes to successful weight loss among adults?

<p>A combination of improved energy balance and behavior modification (A)</p> Signup and view all the answers

What happens to electrons during the process of oxidation?

<p>They are lost from an atom. (B)</p> Signup and view all the answers

What occurs during a negative energy balance?

<p>Weight loss (C)</p> Signup and view all the answers

Which of the following factors does NOT influence the diversity of the gut microbiome?

<p>Body mass index (BMI) (D)</p> Signup and view all the answers

Which of the following correctly describes free radicals?

<p>They are molecules missing an electron and can cause cell damage. (C)</p> Signup and view all the answers

What are short-chain fatty acids (SCFAs) primarily produced by?

<p>Dietary fiber fermentation by gut microbiota (C)</p> Signup and view all the answers

What is a significant consequence of severe vitamin A deficiency?

<p>Night blindness. (B)</p> Signup and view all the answers

Which of the following is a recommended source for estimating energy intake?

<p>Nutrient databases or software (A)</p> Signup and view all the answers

What role does selenium play in the body’s defenses?

<p>It acts as a co-factor for antioxidants. (D)</p> Signup and view all the answers

Which vitamin is NOT produced by the microbiome?

<p>Vitamin C (C)</p> Signup and view all the answers

What percentage of adults are reported to be overweight or obese?

<p>75% (A)</p> Signup and view all the answers

Which of these is NOT a factor during growth stages that can lead to negative energy balance?

<p>Aging (D)</p> Signup and view all the answers

Which of the following food groups are the best sources of selenium?

<p>Meats and seafood (A)</p> Signup and view all the answers

How many bacterial cells are estimated to be present per gram of human feces?

<p>10 billion to 100 billion (B)</p> Signup and view all the answers

Which statement regarding energy intake and expenditure is incorrect?

<p>Negative energy balance is beneficial during all life stages. (C)</p> Signup and view all the answers

What is the calculated Energy Expenditure Rate (EER) based on the given formula?

<p>2323 kcal (C)</p> Signup and view all the answers

What is the energy expenditure for a sedentary male aged 14-18 years?

<p>2200 calories (A)</p> Signup and view all the answers

What body components are now recommended to evaluate instead of traditional weight-for-height tables?

<p>Total body fat and weight-related medical problems (B)</p> Signup and view all the answers

Which formula is used to calculate the Body Mass Index (BMI)?

<p>Weight (in kg) / Height^2 (in meters) (C)</p> Signup and view all the answers

For active children aged 2-3 years, what is their recommended caloric intake?

<p>1400 calories (B)</p> Signup and view all the answers

What is the energy expenditure for a sedentary female aged 19-30 years?

<p>2000 calories (A)</p> Signup and view all the answers

What is the highest recommended caloric intake for sedentary males aged 31-50 years?

<p>2200 calories (A)</p> Signup and view all the answers

Which of the following statements is not true regarding Body Mass Index (BMI)?

<p>It is purely objective. (C)</p> Signup and view all the answers

What method does direct calorimetry use to estimate energy expenditure?

<p>Measuring heat released by the body (D)</p> Signup and view all the answers

Which of the following factors does NOT contribute to the Estimated Energy Requirements (EER)?

<p>Body fat percentage (C)</p> Signup and view all the answers

In indirect calorimetry, what two gases are measured to determine energy expenditure?

<p>Oxygen and carbon dioxide (B)</p> Signup and view all the answers

For men aged 19 and older, what is the formula for calculating EER?

<p>EER = 662 - (9.53 × AGE) + PA(15.91 × WT + 539.6 × HT) (A)</p> Signup and view all the answers

What component does the PA coefficient estimate rely on?

<p>Physical activity level (A)</p> Signup and view all the answers

In the sample calculation for a male who is highly active, what was his EER calculated to be?

<p>2997 kcal (D)</p> Signup and view all the answers

What does the 'PA' in the EER equations stand for?

<p>Physical Activity (C)</p> Signup and view all the answers

Which measurement is used to determine the change in temperature during direct calorimetry?

<p>Layer of water surrounding the chamber (D)</p> Signup and view all the answers

Flashcards

Vitamin E

A fat-soluble vitamin crucial for protecting cells from damage and vital for a healthy immune system.

Vitamin E Sources

Plant oils (salad oils, margarines, shortenings), fortified cereals, nuts, and seeds are the best sources. Avocados and oils in foods also contribute.

Vitamin E RDA

15 mg per day of alpha-tocopherol for adults, found on food labels.

Vitamin E - Upper Limit (UL)

1,000 mg per day. High doses are not beneficial and can have negative interactions with other medications.

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Selenium

A trace mineral that aids in antioxidant function and thyroid hormone regulation.

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Selenium Function (Antioxidant)

Supports glutathione peroxidase, an antioxidant that converts harmful peroxides into water. This protects cell membranes and spares Vitamin E.

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Selenium Deficiency

Low selenium levels may increase cancer risk (especially prostate) and cause muscle/heart/thyroid problems.

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Selenium RDI

55 μg per day for adults. Most healthy adults meet their needs.

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Selenium Food Sources

Brazil nuts, fish, meat, shellfish, eggs, and some grains grown in selenium-rich soil are good sources.

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Selenium UL

400 μg. Excessive levels can be harmful and are best avoided through diet alone.

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Phytochemicals

Compounds found in plants with various beneficial effects on health.

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Lutein and Zeaxanthin

Phytochemicals found in leafy greens, squash, and yellow corn.

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Anthocyanins

Red, blue, and purple pigments in berries.

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Polyphenols

The largest group of phytochemicals.

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Flavonoids

A type of Polyphenol found in various fruits and plants

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Functions of Phytochemicals

Variety of beneficial actions, including antibacterial properties and influence on blood pressure.

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Prebiotics

Substances that feed beneficial gut bacteria.

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Probiotics

Live microorganisms that confer a health benefit when consumed.

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Gut Microbiota

The community of microorganisms in the human gut.

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Microbiome

The entire collection of microorganisms, their genes, and the environment in which they live and interact.

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Short-chain fatty acids (SCFAs)

Substances produced by gut microbiota that have health benefits.

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Immune System Development

Microorganisms promote the maturation of immune cells in the gut.

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Energy Expenditure

The amount of energy (calories) a person uses in a given period of time, influenced by age and activity level.

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Sedentary Activity

Minimal physical activity, like sitting or lying down.

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Active Activity

Physically demanding activities that increase energy expenditure.

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Body Mass Index (BMI)

A measure of body weight relative to height used to categorize weight status.

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Weight-for-Height Tables

Historical method used to assess healthy weight based on height.

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Total Body Fat

The total amount of fat in a body; a component of body composition.

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Location of Body Fat

Where fat is distributed in the body; important for health.

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Weight-Related Medical Problems

Health issues associated with body weight like obesity or underweight.

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Energy Expenditure Formula (EER)

A formula to estimate energy expenditure, using factors like physical activity levels to get a personalized estimate.

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Direct Calorimetry

A method of measuring energy expenditure by directly measuring the heat released by the body.

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Indirect Calorimetry

A method of measuring energy expenditure by analyzing the oxygen consumed and carbon dioxide produced.

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Estimated Energy Requirements (EER)

Calculations estimating daily energy needs based on age, activity level, weight, and height.

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Physical Activity (PA) Coefficient

A value reflecting the intensity of a person's physical activity, used to adjust EER calculations.

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EER Formula (Men)

EER = 662 - (9.53 × Age) + PA × [(15.91 × Weight) + (539.6 × Height)]

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EER Formula (Women)

EER = 655 - (9.56 × Age) + PA × [(15.91 × Weight) + (539.6 × Height)]

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Age (in EER formula)

Age in years, a factor affecting energy expenditure.

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Weight (in EER formula)

Weight in kilograms, used in the calculation of estimated daily energy requirements.

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Height (in EER formula)

Height in meters, a factor in determining energy needs.

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Antioxidant Phytochemicals

Chemicals found in plants that protect the body from damage by unstable molecules called free radicals.

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Phytochemical Examples

Examples include Vitamin C, Vitamin E, and Carotenoids.

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Food Sources of Antioxidants

Fruits, vegetables, whole grains, and nuts are rich in antioxidants.

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Probiotic Microorganisms

Live microorganisms that, when consumed in sufficient amounts, confer a health benefit on the host.

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Food Sources of Probiotics (besides yogurt)

Examples include kefir and some fermented vegetables.

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Probiotics Supporting Immune Health

They may enhance the function of the immune system through mechanisms such as promoting the development of protective gut bacteria or enhancing immune cells.

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Prebiotics and Probiotics Recommendations

Whole food sources are the recommended way to receive these beneficial microorganisms rather than dietary supplements.

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Energy Balance

The relationship between energy intake (food calories) and energy expenditure (activity).

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Energy Equilibrium

When calorie intake matches energy expenditure, maintaining a stable weight.

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Positive Energy Balance

When calorie intake exceeds energy expenditure, leading to weight gain.

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Negative Energy Balance

When calorie intake is less than energy expenditure, leading to weight loss.

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Live and Active Cultures in Yogurt

Yogurt labeled with this statement contains live beneficial bacteria

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Heat inactivation of cultures

Heating destroys live bacteria in food.

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Freezing and cultures

Freezing does not kill live bacteria in food.

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Prebiotic/Probiotic Supplementation

Taking supplements containing beneficial bacteria or substances that promote their growth

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Scientific Information on Prebiotics/Probiotics

Currently, there's limited conclusive scientific research on effectiveness and safety.

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Immune System Support (GI Tract)

The gastrointestinal tract (GI) helps the immune system by both protecting against pathogens and enabling beneficial bacteria to thrive and prevent harmful ones from entering the gut.

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Phagocytosis

The process by which cells engulf and destroy foreign particles, like bacteria.

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Innate Immunity vs. Adaptive Immunity

Innate immunity is the body's immediate, general defense, while adaptive immunity is a targeted, learned response to specific threats.

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Inflammatory Response

The body's reaction to injury or infection, characterized by redness, swelling, heat, and pain.

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Chronic Inflammation Dietary Patterns

Some dietary patterns, like high processed food intake and low fresh produce, can result in long-lasting low levels of inflammation.

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Reduction vs. Oxidation

Reduction is a gain of electrons. Oxidation is a loss of electrons.

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Free Radical

Unstable molecule with an unpaired electron, damaging cells

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Antioxidant Role

Antioxidants neutralize free radicals, preventing cellular damage.

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Vitamin A Deficiency

Leads to weakened immune response, vision problems, and skin issues.

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Carotenoids and vitamin A

Carotenoids are converted to vitamin A in the body.

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Vitamin C Antioxidant Role

Vitamin C protects cells from damage by free radicals and boosts the immune system

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Vitamin C Deficiency Symptoms

Symptoms relate to varied roles in the body including issues with collagen production, connective tissue health, and immune function

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Vitamin E Preventing Oxidative Damage

Vitamin E works as a powerful antioxidant, defending cell membranes from damage

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Vitamin E Toxicity

High levels of vitamin E can lead to adverse effects like bleeding.

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