뒤로Chapter 1 Nutrition Study Guide – Step-by-Step Guidance
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Q1. List several reasons people choose particular foods. What is the #1 factor that drives food choices?
Background
Topic: Food Choices and Influences
This question explores the various factors that influence why people select certain foods, including psychological, social, and sensory reasons. It also asks you to identify the most influential factor.
Key Terms:
Food preference
Sensory influences (taste, smell, appearance)
Social and cultural factors
Cost, convenience, and availability
Step-by-Step Guidance
Think about the different reasons people might choose one food over another (e.g., taste, cost, health, culture, convenience).
List at least three to four reasons, considering both internal (personal preference, health goals) and external (advertising, social situations) factors.
Recall from your reading or lecture which factor is most commonly cited as the primary driver of food choices in the U.S. or globally.
Write down your list and clearly identify the #1 factor.
Try solving on your own before revealing the answer!
Final Answer:
People choose foods for many reasons, including taste, cost, convenience, cultural traditions, health concerns, and social influences. The #1 factor that drives food choices is taste (flavor).
Taste is consistently ranked as the most important reason people select certain foods, even above health or cost.
Q2. Which two tastes are the most preferred?
Background
Topic: Sensory Influences on Food Choices
This question focuses on the basic tastes and which ones humans generally prefer most.
Key Terms:
Basic tastes: sweet, salty, sour, bitter, umami
Preference: a greater liking for certain tastes over others
Step-by-Step Guidance
Recall the five basic tastes that humans can detect.
Think about which tastes are most commonly associated with pleasurable foods (e.g., desserts, snacks).
Consider which tastes are often added to foods to increase their appeal.
Try solving on your own before revealing the answer!
Final Answer:
The two most preferred tastes are sweet and salty.
Humans have an innate preference for sweet (energy-rich) and salty (essential mineral) flavors.
Q3. How is meal size influenced when eating with others?
Background
Topic: Social Influences on Eating Behavior
This question examines how the presence of others can affect how much food a person eats.
Key Terms:
Social facilitation
Meal size
Step-by-Step Guidance
Think about your own experiences eating alone versus with friends or family.
Recall what research says about how group size or social settings can impact food intake.
Consider whether people tend to eat more, less, or the same amount when dining with others.
Try solving on your own before revealing the answer!
Final Answer:
Meal size typically increases when eating with others.
People often eat more food in social settings due to longer meal times and social facilitation.
Q4. Give two examples of how nutrition knowledge might affect food choices.
Background
Topic: Nutrition Knowledge and Food Selection
This question asks you to connect how what you know about nutrition can influence your decisions about what to eat.
Key Terms:
Nutrition knowledge
Food choices
Step-by-Step Guidance
Think about how learning about nutrients, calories, or health effects might change your eating habits.
Come up with two specific examples where someone’s knowledge about nutrition could lead them to choose one food over another.
Write your examples clearly, showing the connection between knowledge and choice.
Try solving on your own before revealing the answer!
Final Answer:
Examples: 1) Choosing whole grain bread instead of white bread after learning about fiber’s health benefits. 2) Selecting low-fat dairy products to reduce saturated fat intake after learning about heart health.
Q5. What two types of foods are least advertised?
Background
Topic: Food Marketing and Advertising
This question is about which food groups or types are not commonly promoted in advertisements.
Key Terms:
Advertising
Food groups
Step-by-Step Guidance
Think about the types of foods you see most often in commercials or ads (e.g., fast food, snacks).
Consider which healthy food groups are rarely advertised.
Identify two types of foods that are least likely to be promoted in media.
Try solving on your own before revealing the answer!
Final Answer:
Fruits and vegetables are the two types of foods least advertised.
Most advertising focuses on processed and convenience foods rather than fresh produce.
Q6. List the six categories of nutrients that serve as building blocks and can sustain body processes.
Background
Topic: Essential Nutrients
This question asks you to recall the main classes of nutrients required for human health.
Key Terms:
Nutrients
Macronutrients and micronutrients
Step-by-Step Guidance
Recall the definition of a nutrient and the main categories discussed in class or your textbook.
List all six categories, making sure to include both energy-yielding and non-energy-yielding nutrients.
Double-check that you have included both macronutrients and micronutrients.
Try solving on your own before revealing the answer!
Final Answer:
The six categories of nutrients are: carbohydrates, proteins, lipids (fats), vitamins, minerals, and water.
Q7. Name two non-nutrient compounds found in food.
Background
Topic: Non-Nutrient Food Components
This question is about substances in food that are not classified as nutrients but may still affect health.
Key Terms:
Non-nutrient compounds
Phytochemicals, additives
Step-by-Step Guidance
Recall examples of substances in food that are not required for life but may have health effects.
Think about plant-based compounds and substances added during processing.
List two examples.
Try solving on your own before revealing the answer!
Final Answer:
Examples: phytochemicals and food additives.
Phytochemicals are plant compounds with health benefits; additives are substances added to preserve or enhance food.
Q8. Which of the nutrients is present in our body in the largest amount?
Background
Topic: Nutrient Composition of the Human Body
This question asks you to identify which nutrient makes up the greatest proportion of the human body.
Key Terms:
Body composition
Major nutrients
Step-by-Step Guidance
Think about the main components of the human body (e.g., water, fat, protein, minerals).
Recall which nutrient is most abundant by weight.
Write down your answer.
Try solving on your own before revealing the answer!
Final Answer:
Water is the nutrient present in the largest amount in the human body.
It makes up about 60% of an adult’s body weight.
Q9. What does it mean for a nutrient to be organic?
Background
Topic: Organic vs. Inorganic Nutrients
This question is about the chemical definition of "organic" as it applies to nutrients.
Key Terms:
Organic nutrient
Carbon-containing compounds
Step-by-Step Guidance
Recall the chemistry definition of "organic" (not just "natural").
Think about which elements must be present for a compound to be considered organic.
Write a concise definition.
Try solving on your own before revealing the answer!
Final Answer:
An organic nutrient contains carbon in its structure.
Carbohydrates, proteins, lipids, and vitamins are organic because they contain carbon.
Q10. Which two nutrients are classified as inorganic?
Background
Topic: Organic vs. Inorganic Nutrients
This question asks you to identify which nutrients do not contain carbon.
Key Terms:
Inorganic nutrient
Minerals, water
Step-by-Step Guidance
Recall which nutrients do not have carbon in their chemical structure.
List the two nutrients that are considered inorganic.
Try solving on your own before revealing the answer!
Final Answer:
Water and minerals are the two inorganic nutrients.
Q11. Define the term “essential nutrient”.
Background
Topic: Essential vs. Nonessential Nutrients
This question is about what makes a nutrient "essential" for human health.
Key Terms:
Essential nutrient
Dietary requirement
Step-by-Step Guidance
Recall the criteria for a nutrient to be considered essential.
Think about whether the body can make the nutrient or must obtain it from food.
Write a clear definition.
Try solving on your own before revealing the answer!
Final Answer:
An essential nutrient is one that must be obtained from the diet because the body cannot make it, or cannot make enough of it, to meet its needs.
Q12. What are the three nutrient categories that supply our body with energy?
Background
Topic: Energy-Yielding Nutrients
This question asks you to identify which nutrients provide calories (energy) to the body.
Key Terms:
Macronutrients
Energy-yielding
Step-by-Step Guidance
Recall which nutrients are broken down to provide energy (calories).
List the three categories.
Try solving on your own before revealing the answer!
Final Answer:
Carbohydrates, proteins, and fats (lipids) are the three energy-yielding nutrients.
Q13. How many calories do you get from each gram of protein? Carbohydrate? Fat (lipid)?
Background
Topic: Caloric Values of Macronutrients
This question is about the energy content per gram of the three macronutrients.
Key Terms and Formulas:
Caloric value per gram
Protein: $4$ kcal/g
Carbohydrate: $4$ kcal/g
Fat: $9$ kcal/g
Step-by-Step Guidance
Recall the standard caloric values for each macronutrient.
Write down the value for protein, carbohydrate, and fat.
Try solving on your own before revealing the answer!
Final Answer:
Protein: 4 kcal/g; Carbohydrate: 4 kcal/g; Fat (lipid): 9 kcal/g.
Q14. How many calories do you get per gram of alcohol? True/False: Because it provides energy, alcohol is considered a nutrient.
Background
Topic: Alcohol as an Energy Source
This question asks about the caloric value of alcohol and whether it is classified as a nutrient.
Key Terms:
Alcohol (ethanol)
Caloric value: $7$ kcal/g
Nutrient definition
Step-by-Step Guidance
Recall the caloric value of alcohol per gram.
Consider the definition of a nutrient and whether alcohol meets this definition.
Decide if the statement is true or false based on your reasoning.
Try solving on your own before revealing the answer!
Final Answer:
Alcohol provides 7 kcal per gram. False: Alcohol is not considered a nutrient because it is not required for life.
Q15. Describe (in words) how you would calculate the percent of calories from protein in a food item. (Assume you are only told the number of grams protein, carbohydrates, and fat)
Background
Topic: Calculating Percent Calories from Macronutrients
This question tests your ability to use macronutrient grams and their caloric values to find the percent of calories from protein.
Key Formula:
Calories from protein = grams protein × 4 kcal/g
Total calories = (grams protein × 4) + (grams carbohydrate × 4) + (grams fat × 9)
Percent calories from protein = (calories from protein / total calories) × 100%
Step-by-Step Guidance
Multiply the grams of protein by 4 to get calories from protein.
Calculate total calories by adding calories from protein, carbohydrate, and fat (using their respective caloric values).
Divide the calories from protein by the total calories, then multiply by 100 to get the percent.
Try solving on your own before revealing the answer!
Final Answer:
To calculate percent calories from protein: (grams protein × 4) ÷ total calories × 100%. Total calories = (grams protein × 4) + (grams carbohydrate × 4) + (grams fat × 9).
Q16. Define the term “macronutrient”.
Background
Topic: Macronutrients vs. Micronutrients
This question is about the definition and characteristics of macronutrients.
Key Terms:
Macronutrient
Energy-yielding
Step-by-Step Guidance
Recall what distinguishes macronutrients from micronutrients (amount needed, energy provision).
Write a definition that includes these characteristics.
Try solving on your own before revealing the answer!
Final Answer:
Macronutrients are nutrients required in large amounts that provide energy to the body: carbohydrates, proteins, and fats.
Q17. List the basic function of carbohydrates.
Background
Topic: Functions of Carbohydrates
This question asks you to recall the main role of carbohydrates in the body.
Key Terms:
Carbohydrates
Energy source
Step-by-Step Guidance
Think about what the body uses carbohydrates for, especially in terms of energy.
Write a brief statement of their primary function.
Try solving on your own before revealing the answer!
Final Answer:
The basic function of carbohydrates is to provide energy for the body, especially for the brain and nervous system.
Q18. What type of animal product is the only significant source of carbohydrates?
Background
Topic: Sources of Carbohydrates
This question asks you to identify which animal-derived food contains significant carbohydrates.
Key Terms:
Animal products
Carbohydrate content
Step-by-Step Guidance
Recall which animal foods (meat, eggs, dairy) contain carbohydrates.
Identify the one that is a significant source.
Try solving on your own before revealing the answer!
Final Answer:
Milk (dairy products) is the only significant animal source of carbohydrates, due to its lactose content.
Q19. Name two basic functions of lipids.
Background
Topic: Functions of Lipids
This question asks you to recall the main roles of fats in the body.
Key Terms:
Lipids (fats)
Energy storage, insulation, cell structure
Step-by-Step Guidance
Think about how the body uses fats for both energy and other functions.
List two distinct functions.
Try solving on your own before revealing the answer!
Final Answer:
Lipids provide energy storage and insulation, and are also important for cell membrane structure.
Q20. List some food sources for lipids.
Background
Topic: Dietary Sources of Lipids
This question asks you to identify foods that are high in fats.
Key Terms:
Lipids
Food sources
Step-by-Step Guidance
Think about both animal and plant sources of fats.
List at least three examples.
Try solving on your own before revealing the answer!
Final Answer:
Food sources for lipids include oils, butter, nuts, seeds, fatty meats, and dairy products.
Q21. List some functions of proteins.
Background
Topic: Functions of Proteins
This question asks you to recall the various roles proteins play in the body.
Key Terms:
Proteins
Enzymes, structure, transport, immune function
Step-by-Step Guidance
Think about the different ways proteins are used in the body (e.g., building tissues, enzymes).
List at least two or three functions.
Try solving on your own before revealing the answer!
Final Answer:
Proteins function as enzymes, provide structure to cells and tissues, transport substances, and support immune function.
Q22. What types of plant products are minimal sources of proteins?
Background
Topic: Protein Content in Plant Foods
This question asks you to identify plant foods that are low in protein.
Key Terms:
Plant products
Protein content
Step-by-Step Guidance
Recall which plant foods are high in protein (e.g., legumes, nuts) and which are not.
Identify types of plant foods that contribute little protein to the diet.
Try solving on your own before revealing the answer!
Final Answer:
Fruits and most vegetables are minimal sources of protein.
Q23. What is the main, general function of vitamins and minerals?
Background
Topic: Functions of Micronutrients
This question asks you to summarize the primary role of vitamins and minerals in the body.
Key Terms:
Vitamins
Minerals
Regulation of body processes
Step-by-Step Guidance
Recall the difference between macronutrients and micronutrients.
Think about how vitamins and minerals help the body function (e.g., as cofactors, in metabolism).
Write a general statement about their function.
Try solving on your own before revealing the answer!
Final Answer:
The main function of vitamins and minerals is to regulate body processes and support metabolism.
Q24. Name some functions of water in our body.
Background
Topic: Functions of Water
This question asks you to recall the roles water plays in maintaining health.
Key Terms:
Water
Transport, temperature regulation, solvent
Step-by-Step Guidance
Think about how water is used in the body (e.g., in blood, cells, temperature control).
List at least two or three functions.
Try solving on your own before revealing the answer!
Final Answer:
Water functions as a solvent, helps regulate body temperature, transports nutrients and waste, and lubricates joints.
Q25. What are phytochemicals?
Background
Topic: Non-Nutrient Compounds in Food
This question asks you to define phytochemicals and their significance.
Key Terms:
Phytochemicals
Plant compounds
Step-by-Step Guidance
Recall the definition of phytochemicals and where they are found.
Write a concise definition, including their source and potential health effects.
Try solving on your own before revealing the answer!
Final Answer:
Phytochemicals are non-nutrient compounds found in plants that may have health-promoting properties.
Q26. When are supplements beneficial?
Background
Topic: Dietary Supplements
This question asks you to identify situations where taking a supplement is helpful or necessary.
Key Terms:
Supplements
Deficiency, special needs
Step-by-Step Guidance
Think about cases where people cannot meet their nutrient needs through food alone.
List at least one or two situations where supplements are recommended.
Try solving on your own before revealing the answer!
Final Answer:
Supplements are beneficial when a person has a nutrient deficiency, increased needs (e.g., pregnancy), or cannot meet needs through diet alone.
Q27. What is the leading cause of death in the United States?
Background
Topic: Nutrition and Chronic Disease
This question asks you to recall the most common cause of death, which is often related to nutrition and lifestyle.
Key Terms:
Chronic disease
Heart disease
Step-by-Step Guidance
Recall the top causes of death in the U.S. (e.g., heart disease, cancer).
Identify which is ranked #1.
Try solving on your own before revealing the answer!
Final Answer:
The leading cause of death in the United States is heart disease (cardiovascular disease).
Q28. What two things lend credibility to a Registered Dietitian Nutritionist (RDN)?
Background
Topic: Nutrition Professionals
This question asks you to identify qualifications that make an RDN a credible source of nutrition information.
Key Terms:
Registered Dietitian Nutritionist (RDN)
Credentials, licensure
Step-by-Step Guidance
Recall the education and certification requirements for RDNs.
List two specific qualifications or credentials.
Try solving on your own before revealing the answer!
Final Answer:
Two things that lend credibility to an RDN are: completion of an accredited nutrition program and passing a national registration exam.
Q29. What percent of American adults are obese, and what four conditions does obesity lead to higher rates of?
Background
Topic: Obesity and Health Risks
This question asks you to recall the prevalence of obesity and its associated health risks.
Key Terms:
Obesity
Chronic diseases
Step-by-Step Guidance
Recall the approximate percentage of U.S. adults classified as obese (check your textbook or lecture notes for the most recent figure).
List four health conditions that are more common in people with obesity.
Try solving on your own before revealing the answer!
Final Answer:
About 40% of American adults are obese. Obesity increases the risk of heart disease, type 2 diabetes, certain cancers, and stroke.
Q30. Name two types of experiments scientists can use to test a hypothesis.
Background
Topic: Scientific Method in Nutrition
This question asks you to identify experimental approaches used in nutrition research.
Key Terms:
Hypothesis
Experimental design
Step-by-Step Guidance
Recall the main types of experiments used in science (e.g., laboratory, clinical, epidemiological).
List two types that are commonly used to test hypotheses in nutrition.
Try solving on your own before revealing the answer!
Final Answer:
Two types of experiments are: laboratory (in vitro or animal studies) and clinical (human intervention) studies.