Step-by-Step Guidance for Nutrition Exam Questions

Q1. List 3 antioxidants.

Background

Topic: Antioxidants in Nutrition

This question tests your knowledge of compounds that help protect the body from oxidative damage caused by free radicals.

Key Terms:

• Antioxidant: A substance that inhibits oxidation and protects cells from damage.

• Free radicals: Unstable molecules that can damage cells.

Step-by-Step Guidance

1. Recall common nutrients and compounds known for their antioxidant properties.

2. Think about vitamins, minerals, and phytochemicals that are often discussed in nutrition courses as antioxidants.

3. Consider examples from fruits, vegetables, and other foods.

Try solving on your own before revealing the answer!

Final Answer:

Three antioxidants are: Vitamin C, Vitamin E, and Selenium.

These compounds help neutralize free radicals and protect cells from oxidative stress.

Q2. What are the outcomes of vitamin A excess?

Background

Topic: Fat-Soluble Vitamins

This question tests your understanding of the effects of consuming too much vitamin A.

Key Terms:

• Vitamin A toxicity: Also called hypervitaminosis A.

• Fat-soluble vitamins: Stored in the body and can accumulate to toxic levels.

Step-by-Step Guidance

1. Recall the symptoms and health risks associated with excessive intake of vitamin A.

2. Think about both acute and chronic effects.

3. Consider which body systems are affected (e.g., liver, skin, bones).

Try solving on your own before revealing the answer!

Final Answer:

Outcomes of vitamin A excess include liver damage, headaches, bone abnormalities, and birth defects.

Vitamin A toxicity can be serious, especially in pregnant women and children.

Q3. Describe the thirst mechanism.

Background

Topic: Water Balance and Homeostasis

This question tests your understanding of how the body regulates fluid intake.

Key Terms:

• Thirst mechanism: The physiological process that prompts us to drink fluids.

• Homeostasis: Maintaining internal balance.

Step-by-Step Guidance

1. Recall which organs and hormones are involved in detecting dehydration.

2. Think about how changes in blood concentration (osmolarity) trigger thirst.

3. Consider the role of the hypothalamus in the brain.

Try solving on your own before revealing the answer!

Final Answer:

The thirst mechanism is triggered when the hypothalamus detects increased blood osmolarity, prompting the sensation of thirst and encouraging fluid intake.

This helps maintain fluid balance and prevent dehydration.

Q4. What are 3 functions of water?

Background

Topic: Water in the Body

This question tests your knowledge of the essential roles water plays in human physiology.

Key Terms:

• Water: The most abundant molecule in the human body.

• Homeostasis: Regulation of internal conditions.

Step-by-Step Guidance

1. Recall the main physiological functions of water.

2. Think about transport, temperature regulation, and chemical reactions.

3. Consider examples from digestion, circulation, and waste removal.

Try solving on your own before revealing the answer!

Final Answer:

Three functions of water are: transporting nutrients and waste, regulating body temperature, and serving as a medium for chemical reactions.

Water is vital for nearly every bodily process.

Q5. List 3 characteristics of minerals.

Background

Topic: Minerals in Nutrition

This question tests your understanding of the properties and roles of minerals in the body.

Key Terms:

• Minerals: Inorganic nutrients required for various bodily functions.

• Major vs. trace minerals: Based on the amount needed by the body.

Step-by-Step Guidance

1. Recall the basic properties of minerals (e.g., inorganic, not destroyed by heat).

2. Think about their roles in structure, regulation, and health.

3. Consider how minerals differ from vitamins.

Try solving on your own before revealing the answer!

Final Answer:

Three characteristics of minerals are: they are inorganic, not destroyed by heat or light, and required in varying amounts (major or trace).

Minerals are essential for structural and regulatory functions in the body.

Q6. What are the 2 kinds of iron and where do you find them?

Background

Topic: Iron in Nutrition

This question tests your knowledge of the forms of dietary iron and their sources.

Key Terms:

• Heme iron: Found in animal foods.

• Non-heme iron: Found in plant foods.

Step-by-Step Guidance

1. Recall the two main types of iron in the diet.

2. Think about which foods contain each type.

3. Consider the bioavailability differences between heme and non-heme iron.

Try solving on your own before revealing the answer!

Final Answer:

The two kinds of iron are heme iron (found in animal foods like meat) and non-heme iron (found in plant foods like beans and spinach).

Heme iron is more easily absorbed by the body than non-heme iron.

Q7. What is hemochromatosis?

Background

Topic: Iron Disorders

This question tests your understanding of a genetic disorder related to iron metabolism.

Key Terms:

• Hemochromatosis: A condition of iron overload.

• Genetic disorder: Caused by inherited mutations.

Step-by-Step Guidance

1. Recall the definition and cause of hemochromatosis.

2. Think about the symptoms and health risks associated with excess iron.

3. Consider how it is diagnosed and managed.

Try solving on your own before revealing the answer!

Final Answer:

Hemochromatosis is a genetic disorder that causes the body to absorb too much iron, leading to iron overload and potential organ damage.

It can result in liver disease, diabetes, and heart problems if untreated.

Q8. Define eating disorders in general.

Background

Topic: Eating Disorders

This question tests your understanding of the general definition and characteristics of eating disorders.

Key Terms:

• Eating disorder: A mental health condition involving abnormal eating habits.

• Examples: Anorexia nervosa, bulimia nervosa, binge eating disorder.

Step-by-Step Guidance

1. Recall the general definition of eating disorders.

2. Think about the psychological and physical aspects.

3. Consider the impact on health and well-being.

Try solving on your own before revealing the answer!

Final Answer:

Eating disorders are mental health conditions characterized by abnormal eating behaviors that negatively affect physical and emotional health.

They often involve extreme concerns about body weight and shape.

Q9. What are the new recommendations for low risk alcohol consumption in Canada?

Background

Topic: Alcohol and Health

This question tests your knowledge of current public health guidelines regarding alcohol intake.

Key Terms:

• Low risk drinking: Guidelines to minimize health risks.

• Public health recommendations: Issued by health authorities.

Step-by-Step Guidance

1. Recall the most recent guidelines from Canadian health authorities.

2. Think about the recommended number of drinks per week for men and women.

3. Consider the rationale behind these recommendations.

Try solving on your own before revealing the answer!

Final Answer:

The new recommendations suggest limiting alcohol to no more than 2 drinks per week to minimize health risks.

Lower consumption is associated with reduced risk of cancer and other diseases.

Q10. Give an example of a phytochemical and its role.

Background

Topic: Phytochemicals in Nutrition

This question tests your understanding of plant compounds and their health benefits.

Key Terms:

• Phytochemical: Bioactive compound found in plants.

• Role: Health-promoting effects, such as antioxidant activity.

Step-by-Step Guidance

1. Recall common phytochemicals found in fruits and vegetables.

2. Think about their health benefits (e.g., cancer prevention, heart health).

3. Consider specific examples like flavonoids or carotenoids.

Try solving on your own before revealing the answer!

Final Answer:

An example of a phytochemical is lycopene, which acts as an antioxidant and may help reduce the risk of certain cancers.

Phytochemicals are found in plant foods and contribute to health beyond basic nutrition.

Q11. Define enrichment and fortification. Give example of each.

Background

Topic: Food Processing and Nutrition

This question tests your understanding of how nutrients are added to foods.

Key Terms:

• Enrichment: Adding back nutrients lost during processing.

• Fortification: Adding nutrients not originally present.

Step-by-Step Guidance

1. Recall the definitions of enrichment and fortification.

2. Think about common examples in processed foods.

3. Consider why these practices are important for public health.

Try solving on your own before revealing the answer!

Final Answer:

Enrichment is adding back nutrients lost during processing (e.g., B vitamins in white flour). Fortification is adding nutrients not originally present (e.g., vitamin D in milk).

Both practices help improve the nutritional quality of foods.

Q12. One percent of calcium is in the blood. What are the functions of this calcium?

Background

Topic: Calcium in the Body

This question tests your knowledge of the roles of calcium outside of bone structure.

Key Terms:

• Calcium: Essential mineral for many bodily functions.

• Blood calcium: Regulated tightly for critical functions.

Step-by-Step Guidance

1. Recall the physiological roles of calcium in the blood.

2. Think about muscle contraction, nerve transmission, and blood clotting.

3. Consider how calcium is regulated by hormones.

Try solving on your own before revealing the answer!

Final Answer:

Blood calcium is essential for muscle contraction, nerve transmission, and blood clotting.

These functions are critical for survival and are tightly regulated.

Q13. What is bioavailability?

Background

Topic: Nutrient Absorption

This question tests your understanding of how well nutrients are absorbed and utilized by the body.

Key Terms:

• Bioavailability: The proportion of a nutrient that is absorbed and used.

• Absorption: Movement of nutrients from the digestive tract into the body.

Step-by-Step Guidance

1. Recall the definition of bioavailability.

2. Think about factors that affect how much of a nutrient is available to the body.

3. Consider examples of nutrients with high or low bioavailability.

Try solving on your own before revealing the answer!

Final Answer:

Bioavailability is the proportion of a nutrient that is absorbed and available for use or storage in the body.

It varies depending on the nutrient and individual factors.

Q14. What affects the bioavailability of minerals?

Background

Topic: Mineral Absorption

This question tests your understanding of the factors influencing how well minerals are absorbed.

Key Terms:

• Bioavailability: How much of a mineral is absorbed and used.

• Factors: Dietary, physiological, and chemical influences.

Step-by-Step Guidance

1. Recall dietary factors that can enhance or inhibit mineral absorption (e.g., vitamin C, phytates).

2. Think about individual factors like age, health status, and nutrient interactions.

3. Consider examples of minerals with variable bioavailability.

Try solving on your own before revealing the answer!

Final Answer:

Bioavailability of minerals is affected by factors such as presence of enhancers (e.g., vitamin C), inhibitors (e.g., phytates, oxalates), and individual health status.

These factors determine how much of a mineral is absorbed and used.

Q15. Humans can make which 2 vitamins?

Background

Topic: Vitamin Synthesis

This question tests your knowledge of vitamins that can be synthesized by the human body.

Key Terms:

• Vitamin synthesis: Production of vitamins by the body.

• Essential vs. non-essential vitamins: Based on whether they must be obtained from the diet.

Step-by-Step Guidance

1. Recall which vitamins are synthesized in the skin or by gut bacteria.

2. Think about the role of sunlight and intestinal flora.

3. Consider why most vitamins must be obtained from the diet.

Try solving on your own before revealing the answer!

Final Answer:

Humans can make vitamin D (in the skin with sunlight) and vitamin K (by gut bacteria).

These are the only two vitamins synthesized in significant amounts by the body.

Q16. What are the health benefits of exercise?

Background

Topic: Physical Activity and Health

This question tests your understanding of how exercise contributes to overall health.

Key Terms:

• Exercise: Physical activity that improves health.

• Health benefits: Physical, mental, and metabolic improvements.

Step-by-Step Guidance

1. Recall the main benefits of regular physical activity.

2. Think about effects on cardiovascular health, weight management, and mental well-being.

3. Consider examples of disease prevention.

Try solving on your own before revealing the answer!

Final Answer:

Health benefits of exercise include improved cardiovascular health, weight control, and reduced risk of chronic diseases.

Exercise also enhances mood and mental health.

Q17. What is the energy recommendation for athletes and macronutrients?

Background

Topic: Sports Nutrition

This question tests your understanding of dietary needs for athletes.

Key Terms:

• Energy recommendation: Amount of calories needed.

• Macronutrients: Carbohydrates, proteins, fats.

Step-by-Step Guidance

1. Recall the increased energy needs for athletes compared to non-athletes.

2. Think about the recommended proportions of macronutrients for optimal performance.

3. Consider how these recommendations vary by sport and training intensity.

Try solving on your own before revealing the answer!

Final Answer:

Athletes require higher energy intake, with recommendations for carbohydrates (55-65%), protein (10-15%), and fat (20-30%) of total calories.

These proportions support performance and recovery.

Q18. What are 3 health risks of excess body fat?

Background

Topic: Obesity and Health Risks

This question tests your understanding of the consequences of excess adiposity.

Key Terms:

• Excess body fat: Overweight and obesity.

• Health risks: Increased risk of chronic diseases.

Step-by-Step Guidance

1. Recall the main diseases associated with excess body fat.

2. Think about cardiovascular, metabolic, and cancer risks.

3. Consider examples from public health data.

Try solving on your own before revealing the answer!

Final Answer:

Three health risks of excess body fat are heart disease, type 2 diabetes, and certain cancers.

Excess fat increases inflammation and metabolic dysfunction.

Q19. What is the difference between satiation and satiety?

Background

Topic: Hunger and Eating Regulation

This question tests your understanding of the mechanisms controlling food intake.

Key Terms:

• Satiation: The feeling of fullness during a meal.

• Satiety: The feeling of fullness after a meal, preventing further eating.

Step-by-Step Guidance

1. Recall the definitions of satiation and satiety.

2. Think about when each occurs in the eating process.

3. Consider the physiological signals involved.

Try solving on your own before revealing the answer!

Final Answer:

Satiation is the feeling that stops you from eating during a meal, while satiety is the feeling that prevents you from eating between meals.

Both are important for regulating food intake.

Q20. What are the healthy eating habits?

Background

Topic: Healthy Eating Patterns

This question tests your understanding of behaviors that promote good nutrition.

Key Terms:

• Healthy eating: Consuming a balanced, varied diet.

• Habits: Regular behaviors that support health.

Step-by-Step Guidance

1. Recall the main principles of healthy eating (balance, moderation, variety).

2. Think about practical habits like meal planning and mindful eating.

3. Consider recommendations from health authorities.

Try solving on your own before revealing the answer!

Final Answer:

Healthy eating habits include eating a variety of foods, controlling portion sizes, and limiting added sugars and saturated fats.

These habits support overall health and well-being.

Q21. Describe the Canada food guide healthy food recommendations.

Background

Topic: Dietary Guidelines

This question tests your knowledge of national nutrition recommendations.

Key Terms:

• Canada Food Guide: Official dietary recommendations.

• Healthy food choices: Emphasis on plant-based foods.

Step-by-Step Guidance

1. Recall the main messages of the Canada Food Guide.

2. Think about recommended food groups and proportions.

3. Consider the importance of water and limiting processed foods.

Try solving on your own before revealing the answer!

Final Answer:

The Canada Food Guide recommends eating plenty of vegetables and fruits, whole grains, and protein foods, with an emphasis on plant-based options.

It also encourages drinking water and limiting processed foods.

Q22. What are proteins made of?

Background

Topic: Protein Structure

This question tests your understanding of the basic building blocks of proteins.

Key Terms:

• Protein: A macronutrient made of amino acids.

• Amino acids: Organic compounds that form proteins.

Step-by-Step Guidance

1. Recall the basic structure of proteins.

2. Think about how amino acids are linked together.

3. Consider the diversity of amino acids in protein formation.

Try solving on your own before revealing the answer!

Final Answer:

Proteins are made of amino acids linked together in chains.

There are 20 different amino acids that combine to form proteins.

Q23. What is the difference between essential and non-essential amino acids?

Background

Topic: Amino Acids in Nutrition

This question tests your understanding of amino acid classification.

Key Terms:

• Essential amino acids: Cannot be made by the body, must be obtained from diet.

• Non-essential amino acids: Can be synthesized by the body.

Step-by-Step Guidance

1. Recall the definitions of essential and non-essential amino acids.

2. Think about dietary sources and body synthesis.

3. Consider why this distinction is important for nutrition.

Try solving on your own before revealing the answer!

Final Answer:

Essential amino acids must be obtained from the diet, while non-essential amino acids can be made by the body.

This distinction affects dietary protein requirements.

Q24. What are the steps in protein synthesis?

Background

Topic: Protein Synthesis

This question tests your understanding of how proteins are made in cells.

Key Terms:

• Transcription: Copying DNA to mRNA.

• Translation: Assembling amino acids into proteins.

Step-by-Step Guidance

1. Recall the two main steps: transcription and translation.

2. Think about where each step occurs in the cell.

3. Consider the role of mRNA, ribosomes, and tRNA.

Try solving on your own before revealing the answer!

Final Answer:

The steps in protein synthesis are transcription (DNA to mRNA) and translation (mRNA to protein).

These steps ensure the correct assembly of amino acids into functional proteins.