1. Overview of Nutrition Flashcards
What influences people’s food choices?
Personal preference, genetics, habit, culture/religion, traditions, social interactions, food availability, emotional eating, body weight and image, political or environmental views, nutrition and health.
What are the 6 key nutrients?
Water, Carbs, Proteins, Fats, vitamins, minerals
What are some non-nutrient componenets of foods?
fibres, phyto-chemicals, pigments, additives, alcohols
Which of the main nutrients are organic?
Vitamins, carbohydrates, proteins and fats
Which of the main nutrients are inorganic?
water and minerals
What are “essential nutrients”?
Nutrients that the body cannot make in adequate quantities. Must be obtained from foods.
Which fat soluble vitamins are essential nutrients?
A, D, E, K
Which if the key nutrients are energy yeilding?
Carbs, Proteins, Fats
Which of the key nutrients are considered macronutrients?
Carbs, Proteins, Fats
Which of the key nutrients are considered micronutrients?
vitamins and minerals
What is the energy density of carbohydrate?
17kJ/g
What is the energy density of fats?
37kJ/g
What is the energy density of proteins?
17kJ/g
What is the energy density of alcohol?
29kJ/g
What is the energy density of water?
17kJ/g
How many kJ in 1 kcal?
4.2kJ
How many of the 613kJ provided by a 375ml can of beercome from alcohol, if the beer contains 1g of protein and 13g carbohydrate?
375kJ
What are the 3 key functions of nutrients in the body?
- provide energy, 2. Promote growth and development, 3.Regulate body processes.
Which nutrients provide energy?
Carbs, Proteins, Fats
Which nutrients promote growth and development?
Proteins, fats, vitamins, minerals, water
Which nutrients regulate body processes?
Proteins, fats, vitamins, minerals, water
Can you yeild energy from all nutrients?
No, only proteins, carbs and fats
What is nutrition?
Ths study of the nutrients and other substances in foods and the body’s handling of them.
Name 3 design types for epidemiological studies?
Cross-sectional, case-control, and cohort
Describe a cross-sectional study?
Researchers how much and what kinds of food a group of people eat and how healthy they are. Findings identify factors that might influence diease in the population
Describe a case-control study?
Researchers compare people who do and do not have a condition, match them in age, gender and other key variables so that differences in other factors will stand out.
Describe a cohort study?
Researchers analyze data collected from a selected group of people (a cohort) at intervals over a certain period of time.
How are laboratory based animal studies conducted?
In animal based studies, researchers feed animals special diets that add or omit a certain nutrient and observe health changes.
How do human intervention or clinical based studies work?
Researchers ask people to adopt a new behaviour. Trials help determine the effectiveness of interventions.
How are invitro laboratory studies conducted?
Researchers examine the effects of a specific variable on an isolated tissue, cell or molecule froma living organism.
Outline the scientific method?
Observation and question–> Hypothesis and prediction–> Experimentation–> Results and interpretation–> If hypothesis is supported, may develop a theory. If not supported then further observations and questions…
What criteria need to be met for a finding to be accepted into the body of nutrition knowledge?
Must stand up to rigorous, repeated testing by several different researchers
What process is used to evaluate the procedures used and the conclusions drawn in a study?
peer review
On what things might someone evaluate the reliability of a study?
The journal, funding source, authors, methodology and discussion of results.
How is replication important in scientific studies?
Can be used to prove or disprove findings.
What main assesment techniques are used to assess nutritional health of individuals?
History (incl diet, health status, socioeconomic status, drug use…), anthropomorphic (measure physical characteristics incl. height and weight), Physical examination, laboratory testing (ex. Blood and urine)
What main assessment techniques are used to assess nutritional health of populations?
National nutrition surveys
What does “NRV” stand for?
Nutrient Reference Value
What is an NRV?
set of standards that define the amounts of energy, nutrients, other dietary components and physical activity that best promotes heath.
What is “EAR”?
Estimated Average Requirement - A daily nutrient level estimated to meet the requirements of half of healthy individuals in a particular age and gender group.
What is “RDI”?
Recommended Dietary Intake - Average daily dietary intake sufficient to meet the needs of nearly all (~98%) of healthy individuals in a particular age and gender group.
What is “AI”?
Adequate Intake - average daily nutrient intake approximation. Used when the RDI is not available.
What is “EER”?
Estimated Energy Requirement - average dietary energy intake that is predicted to maintain energy balance in a healthy adult of defined gender, height, weight and level of physical activity consistent with good health.
What is “UL”?
Upper Level of Intake - the highest average daily nutrient intake level likely to pose no adverse health effects to almost all individuals.
What does AMDR stand for?
Acceptable Macronutrient Distribution Range
What is “AMDR”?
Acceptable Macronutrient Distribution Range - the range of intakes for macronutrients that provide adequate energy and nutrients and reduce the risk of chronic disease.
What is the AMDR range for Carbohydrates?
45-65% kJ
What is the AMDR range for Proteins?
15-25% kJ
What is the AMDR range for Fats?
20-35% kJ
Functional foods are foods that:
a. have health benefits beyond their nutrient content.
b. are specially developed for consumers’ taste preferences.
c. have essential roles in diet.
d. are genetically modified to provide essential nutrients.
a
The human body composition for an average healthy adult is:
a. 25 per cent water, 20 per cent fat, 55 per cent protein, carbohydrate, minerals and other
compounds
b. 45 per cent water, 25 per cent fat, 30 per cent protein, carbohydrate, minerals and other
compounds
c. 60 per cent water , 20 per cent fat, 20 per cent protein, carbohydrate, minerals and other
compounds
d. 50 per cent water , 20 per cent fat, 30 per cent protein, carbohydrate, minerals and other
compounds
c
Which of the following could be classified as inorganic nutrients?
a. Minerals and vitamins
b. Water and minerals
c. Vitamins and water
d. Lipids and minerals
b
An organic nutrient is:
a. found in plant material.
b. a nutrient derived from plants and animals that are organically farmed.
c. a nutrient that contains carbon.
d. a nutrient that contains hydrogen.
c
200 kilocalories is equivalent to:
a. 400 kilojoules.
b. 840 kilojoules.
c. 420 kilojoules.
d. 840 joules.
d
The Estimated Average Requirement (EAR) of a nutrient is:
a. the average amount required by an individual.
b. the average amount that meets the needs of half the population.
c. the estimated average daily requirement for an individual.
d. the estimated average weekly requirement for an individual.
b
An Adequate Intake (AI) of a nutrient:
a. is a certain quantity of a nutrient that, if consumed, will be sufficient to meet dietary
requirements.
b. is a signal that there is insufficient evidence to establish an RDI.
c. is an adequate amount for half the population.
d. reflects the average intake of an individual that will meet average requirements.
b
The acceptable macronutrient distribution range for macronutrients areas is:
a. 55–65 per cent carbohydrate, 25–35 per cent fat and 10–15 per cent protein.
b. 40–60 per cent carbohydrate, 20–35 per cent fat and 20–30 per cent protein.
c. 35–60 per cent carbohydrate, 20–30 per cent fat and 25–35 per cent protein.
d. 45–65 per cent carbohydrate, 20–35 per cent fat and 15–25 per cent protein.
d
Recommended dietary intakes (RDI) are:
a. the recommended intakes of intakes a person should have daily to avoid deficiencies.
b. recommended intakes of nutrients that should be consumed most of the time.
c. the average nutrient intake a person should have.
d. recommendations only, and are unnecessary to have.
a
If a group of people were to consume an amount of protein equal to the Estimated Average
Requirement (EAR) for their population group, what percentage of the group would receive
insufficient amounts of protein?
a. Two
b. 33
c. 50
d. 98
c