Nutrition Summary Year 2
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Questions and Answers

What are monosaccharides and can you name a few examples?

Monosaccharides are the simplest form of carbohydrates, consisting of single sugar units. Examples include glucose, fructose, and galactose.

How are disaccharides formed and what are some examples?

Disaccharides are formed when two monosaccharides join through a chemical reaction. Examples include sucrose, lactose, and maltose.

What distinguishes polysaccharides from monosaccharides and disaccharides?

Polysaccharides are complex carbohydrates made up of many monosaccharide units linked together. They differ by their larger structure and storage capacity for energy.

What is the primary role of mitochondria in the body?

<p>The mitochondria generate large quantities of energy in the form of adenosine triphosphate (ATP).</p> Signup and view all the answers

What is ATP, and why is it important for the body?

<p>ATP, or adenosine triphosphate, is a chemical substance that stores and releases energy in body cells. It is essential for various cellular processes, including protein synthesis.</p> Signup and view all the answers

Where is insulin produced, and what is its primary function?

<p>Insulin is produced in the islets of Langerhans in the pancreas, and its primary function is to regulate metabolism and facilitate the use of glucose for energy.</p> Signup and view all the answers

Can you explain the relationship between insulin and glucose?

<p>Insulin helps cells absorb glucose from the bloodstream, allowing it to be used for energy. It regulates blood sugar levels after meals.</p> Signup and view all the answers

What foods are good sources of starch?

<p>Good sources of starch include wheat, rice, corn, and potatoes, as well as products made from them like bread and pasta.</p> Signup and view all the answers

What foods are considered complete proteins?

<p>Examples of complete proteins include whole grain bread with peanut butter, rice and beans, quinoa, and hummus.</p> Signup and view all the answers

What distinguishes incomplete proteins from complete proteins?

<p>Incomplete proteins contain some, but not all, of the essential amino acids.</p> Signup and view all the answers

How many essential amino acids must be obtained from the diet?

<p>There are 9 essential amino acids that must be obtained from our diet.</p> Signup and view all the answers

What role do amino acids play in the body?

<p>Amino acids serve as building blocks of proteins, providing structure and aiding in nutrient transport, organ building, and tissue repair.</p> Signup and view all the answers

What dietary strategies can help lower the chance of muscle pain?

<p>Hydration, good electrolyte balance, a recovery meal after training, and stretching at the end of the day can help lower muscle pain.</p> Signup and view all the answers

What is gluten, and why is it significant for those with Coeliac disease?

<p>Gluten is a group of proteins found in wheat, and individuals with Coeliac disease are intolerant to gliadin, one of its components.</p> Signup and view all the answers

What are the benefits of whey protein?

<p>Whey protein is high in essential fatty acids and branched chain amino acids, aiding in lean tissue maintenance and boosting fat-burning.</p> Signup and view all the answers

What are the three main functions of fats in the body?

<p>Fats provide energy, contribute to cell structure, and form a protective coating around nerve cells.</p> Signup and view all the answers

What percentage of daily dietary requirements should carbohydrates ideally comprise?

<p>Carbohydrates should make up between 50-60 percent of daily requirements.</p> Signup and view all the answers

What is the recommended timing for consuming carbohydrates before training?

<p>The last meal rich in carbohydrates should be consumed 1-2 hours before training.</p> Signup and view all the answers

How much fluid is recommended to drink 10 minutes before training?

<p>It is recommended to drink 150-200 ml of water or an isotonic drink.</p> Signup and view all the answers

What type of meal should be consumed after heavy training to aid recovery?

<p>A recovery meal that includes protein should be consumed after heavy training.</p> Signup and view all the answers

What should be consumed within 30 minutes after training for optimal recovery?

<p>Protein in combination with carbohydrates should be consumed within 30 minutes after training.</p> Signup and view all the answers

What role does the vagus nerve play in digestion?

<p>The vagus nerve regulates the speed of digestion and transmits signals from the gut to the brain.</p> Signup and view all the answers

What digestive issues can arise from a damaged vagus nerve?

<p>Low stomach acid levels and low enzyme production can occur, leading to ineffective digestion.</p> Signup and view all the answers

What are the main components recommended for a balanced lunch?

<p>Lunch should include a combination of carbohydrates, proteins, vegetables, and healthy fats.</p> Signup and view all the answers

What role does insulin play in glucose metabolism?

<p>Insulin facilitates the uptake of glucose into cells and prevents the utilization of fat as an energy source.</p> Signup and view all the answers

What is a primary distinction between Type 1 and Type 2 diabetes?

<p>Type 1 diabetes is caused by an autoimmune attack on insulin-producing cells, while Type 2 diabetes is characterized by insufficient insulin production.</p> Signup and view all the answers

How do calories differ in their energy yield between carbohydrates, proteins, and fats?

<p>Carbohydrates and proteins yield 4 calories per gram, while fats yield 9 calories per gram.</p> Signup and view all the answers

What influence does physical activity have on daily calorie needs?

<p>Increased physical activity raises calorie needs to maintain weight or achieve weight loss/gain goals.</p> Signup and view all the answers

What is the daily calorie requirement for an average male aged 19-50 years?

<p>An average male aged 19-50 years needs 2500 to 2900 calories per day.</p> Signup and view all the answers

What occurs in the absence of insulin regarding energy sources?

<p>In the absence of insulin, glucose is not taken up by cells, leading the body to use fat as an alternative energy source.</p> Signup and view all the answers

How can changes in diet and activity influence Type 2 diabetes?

<p>Modifying diet and increasing physical activity can improve insulin sensitivity and may help manage Type 2 diabetes.</p> Signup and view all the answers

What is the estimated calorie requirement for female dancers during heavy training?

<p>Female dancers require approximately 45-50 calories per kilogram of body weight during heavy training.</p> Signup and view all the answers

What role do antioxidants play in the body?

<p>Antioxidants protect the body from free radicals, which are responsible for aging.</p> Signup and view all the answers

Why are fat-soluble vitamins important and which vitamins fall under this category?

<p>Fat-soluble vitamins A, D, E, and K need to be consumed with fat for optimal absorption.</p> Signup and view all the answers

List one source of vitamin A and its importance in the body.

<p>Carrots are a source of vitamin A, which is important for good vision and boosting immune function.</p> Signup and view all the answers

How does vitamin D contribute to bone health?

<p>Vitamin D regulates the absorption and use of calcium, helping to keep bones and teeth strong.</p> Signup and view all the answers

Identify a function of vitamin E.

<p>Vitamin E protects red blood cells and acts as an antioxidant.</p> Signup and view all the answers

What are the consequences of insufficient iron intake?

<p>Insufficient iron can lead to a lack of energy and stamina.</p> Signup and view all the answers

Explain the role of zinc in the body.

<p>Zinc maintains a sense of smell, supports the immune system, and aids in protein synthesis.</p> Signup and view all the answers

Why are essential minerals important for overall health?

<p>Essential minerals are vital for building strong bones, controlling bodily fluids, and converting food into energy.</p> Signup and view all the answers

What are the main role and benefits of omega-3 fatty acids in the body?

<p>Omega-3 fatty acids help reduce inflammation, support mental health, and promote good skin and hair.</p> Signup and view all the answers

Where can omega-6 fatty acids be primarily found in our diet?

<p>Omega-6 fatty acids are primarily found in corn oil, soybean oil, poultry, and red meat.</p> Signup and view all the answers

What is the significance of omega-9 fatty acids regarding heart health?

<p>Omega-9 fatty acids increase HDL cholesterol and decrease LDL cholesterol, offering protection against heart disease.</p> Signup and view all the answers

Identify two sources of saturated fat and their health risks.

<p>Saturated fats are found in red meat and butter, and they raise total blood cholesterol levels, increasing the risk of cardiovascular disease.</p> Signup and view all the answers

What is trans fat, and why is it considered harmful?

<p>Trans fat is a solid form of fluid plant oil that increases unhealthy LDL cholesterol and lowers healthy HDL cholesterol.</p> Signup and view all the answers

What is the difference between good cholesterol and bad cholesterol?

<p>Good cholesterol (HDL) helps remove excess cholesterol from the bloodstream, while bad cholesterol (LDL) can lead to plaque buildup in the arteries.</p> Signup and view all the answers

How does cholesterol function in the body, despite not being a fat?

<p>Cholesterol is a fat-like substance necessary for building cells and producing certain hormones in the body.</p> Signup and view all the answers

List two food sources of omega-3 fatty acids along with their respective recommendations.

<p>Fatty fish like salmon and walnuts are good sources of omega-3s, recommended as 2-3 servings a week or through supplements.</p> Signup and view all the answers

Flashcards

Insulin's Role in Glucose Uptake

Insulin, a hormone produced by the pancreas, facilitates the transfer of glucose from the bloodstream into cells for energy production. It prevents fat from being used as an energy source.

Diabetes Type 1

An autoimmune disease where the body's immune system attacks insulin-producing cells in the pancreas, leading to a lack of insulin production. People with type 1 diabetes require daily insulin injections.

Diabetes Type 2

A condition where the body either does not produce enough insulin or the cells become resistant to insulin, leading to high blood sugar levels. It usually develops in middle age and is linked to factors like genetics, obesity, and lack of physical activity.

Digestive Tract

A series of organs responsible for breaking down food into smaller molecules that can be absorbed by the body. It starts with the mouth and ends at the anus, passing through the pharynx, esophagus, stomach, small intestine, large intestine, and rectum.

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Energy in Food: Calories

Calories are units used to measure the energy content of food. Carbohydrates and proteins provide 4 calories per gram, while fats provide 9 calories per gram.

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Calorie Balance for Weight Management

Maintaining a healthy weight requires balancing calorie intake with calorie expenditure. Eating fewer calories than needed leads to weight loss, while eating more calories than needed leads to weight gain.

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Calorie Needs for Dancers

Dancers require more calories than sedentary individuals due to their high activity levels. On average, they burn 2,000 to 3,000 calories per day.

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Calorie Estimation for Dancers

A rough estimate of calorie needs for dancers is 45-50 calories per kilogram of body weight for females and 50-55 calories per kilogram of body weight for males.

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Carbohydrate Intake for Training

Carbohydrates should make up 50-60% of your daily intake. A last meal rich in carbs should be eaten 1-2 hours before training. Small snacks with carbs can be consumed before or during training.

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Pre-Training Meal

Eat a light meal 1-2 hours before training, focusing on carbohydrates. A small snack with carbs is also helpful before or during training.

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Post-Workout Meal

After training, replenish fluids and glycogen stores. Aim for a protein and carbohydrate-rich meal within 30 minutes, followed by carbohydrates within 2 hours.

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Fluid Intake During Training

Drink 150-200 ml water or isotonic drink 10 minutes before starting. During longer training sessions (more than 1 hour), drink 400-800 ml water per hour.

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Vagus Nerve and Digestion

The vagus nerve connects the brain to various systems, including the digestive system. It plays a crucial role in digestion speed and signaling between the gut and brain.

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Vagus Nerve and Stomach

A stressed or damaged vagus nerve can lead to low stomach acid and enzyme production, resulting in ineffective digestion.

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Importance of Regular Meals

Eating regular meals every 2-3 hours helps maintain stable blood sugar levels and energy levels.

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Food before Sleep

Eat a light meal 2-3 hours before sleep to aid digestion and prevent nighttime hunger.

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Complete Protein

A protein source that provides all 9 essential amino acids needed for the body to function properly.

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Incomplete Protein

A protein source that does not provide all 9 essential amino acids. Often found in plant-based foods.

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Essential Amino Acids

9 amino acids that our body cannot produce on its own and must be obtained through diet.

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Non-Essential Amino Acids

11 amino acids that our body can produce from other sources, including essential amino acids and protein breakdown.

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Gluten

A protein found in wheat, barley, and rye. Made from gliadin and glutenin, which can cause problems for people with Celiac disease.

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Whey Protein

A complete protein source obtained from milk, known for its high levels of essential amino acids and branched-chain amino acids.

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Fat's Role in the Body

Fat is a key macronutrient providing energy, supporting body cell structure, forming brain and nerve coatings, and acting as a primary energy storage.

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Carbohydrate Conversion to Fat

Excess carbohydrates in the body, beyond what's needed for immediate energy, are converted into fat for storage.

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What are antioxidants?

Antioxidants are substances like vitamins that protect the body from damage caused by free radicals. Free radicals are unstable molecules that can damage cells and contribute to aging.

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What are fat-soluble vitamins?

Fat-soluble vitamins, like vitamins A, D, E, and K, need to be absorbed with dietary fat for your body to use them efficiently.

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What does vitamin A do for your body?

Vitamin A is important for good vision, boosting your immune system, and maintaining healthy skin and tissue. You can get vitamin A directly from food or your body can convert it from beta-carotene found in plants like carrots.

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What is one of the main functions of vitamin D?

Vitamin D helps your bones and teeth stay strong by regulating how your body absorbs and uses calcium. Sunlight helps your body make vitamin D.

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What are minerals and why are they important?

Minerals are essential nutrients that help your body function properly. They contribute to building strong bones and teeth, controlling body fluids, and converting food into energy.

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What is calcium's role in your body?

Calcium is crucial for building and maintaining strong bones and teeth. It also plays a role in nerve signaling, muscle contraction, and hormone secretion.

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What is iron's main function in the body?

Iron is essential for transporting oxygen throughout your body. It helps your red blood cells carry oxygen to all your organs and tissues.

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What is zinc's role in your body?

Zinc is a vital mineral involved in many important functions including maintaining your sense of smell, keeping a healthy immune system, building proteins, and creating DNA.

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What are Omega-3 Fatty Acids?

Omega-3 fatty acids are polyunsaturated fats that play a crucial role in reducing inflammation, improving brain function, and promoting heart health. They are found in fatty fish like salmon, mackerel, and cod, as well as walnuts and spinach.

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What are Omega-6 Fatty Acids?

Omega-6 fatty acids are another type of polyunsaturated fat, essential for immune function and cell growth. They are found in corn and soybean oils, poultry, red meat, and eggs.

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What are Omega-9 Fatty Acids?

Omega-9 fatty acids are monounsaturated fats that are not essential, meaning your body can produce them. They are involved in heart health and cholesterol regulation. They are found in olive oil, avocados, and nuts like almonds and walnuts.

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What is Saturated Fat?

Saturated fat is a type of fat found primarily in animal products like red meat, cheese, and butter. It can raise cholesterol levels and increase the risk of heart disease.

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What is Trans Fat?

Trans fat is an unhealthy type of fat created by a process called hydrogenation. It is often found in processed foods like chips, cakes, and cookies and raises bad cholesterol levels.

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What are Monounsaturated Fats?

Monounsaturated fats are a type of healthy fat, beneficial for heart health. They are found in foods like olives, avocados, and nuts.

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What are Polyunsaturated Fats?

Polyunsaturated fats are another category of healthy fats, including omega-3 and omega-6 fatty acids. The body needs these fats, but cannot produce them on its own.

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What is Cholesterol?

Cholesterol is a fat-like substance found in your body and in some foods. It is important for building cell membranes and producing certain hormones. Too much can contribute to heart disease.

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Monosaccharides

Simple sugar units like glucose, fructose, and galactose. They're the most basic form of carbohydrates.

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Disaccharides

Two monosaccharides joined together. Examples include sucrose (table sugar), lactose (milk sugar), and maltose.

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Polysaccharides

Complex carbohydrates made up of many monosaccharides linked in a long chain. Examples include starch, glycogen, cellulose, and chitin.

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Glucose

The primary sugar our body cells use for energy. Found in fruits and vegetables.

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Fructose

A simple sugar found in fruits and vegetables, especially honey, apples, and pears.

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Starch

A complex carbohydrate (polysaccharide) that plants use to store energy. It's a long chain of glucose molecules.

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ATP (Adenosine Triphosphate)

A chemical substance that body cells use to store and release energy. It's produced in the mitochondria.

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Insulin

A hormone produced in the pancreas that helps regulate blood sugar levels by allowing glucose to enter cells.

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Study Notes

Summary Nutrition Year 2

  • Glycogen: Storage form of glucose in humans, fungi, bacteria, and animals. Stored in the liver and muscles for future energy. Plants store glucose as starch.
  • Fiber: Undigested, unabsorbed carbohydrate in the diet. Increases stool weight, resists human digestive enzymes. Two types:
    • Soluble fiber: Dissolves in water, forms a gel-like substance. Helps lower blood cholesterol and glucose levels. Found in oats, peas, beans, apples, citrus, carrots, and barley.
    • Insoluble fiber: Doesn't dissolve in water. Promotes material movement through the digestive system, increasing stool bulk. Helps prevent/relieve constipation. Found in whole-wheat flour, wheat bran, nuts, beans, cauliflower, green beans, and potatoes.
  • Carbohydrates: Provide energy for body functions. About 4 calories per gram. Includes:
    • Sugar: Simple carbohydrates.
    • Starch: Complex carbohydrate, primary energy storage for plants. Found in wheat, rice, and corn.
  • Excess Sugar: Stored in muscles and the liver (as glycogen) or as fat.
  • Monosaccharides: Simplest form of carbohydrates (e.g., glucose, fructose, galactose).
  • Disaccharides: Two monosaccharides joined together (e.g., sucrose, lactose, maltose).
  • Polysaccharides: Complex carbohydrates made of many monosaccharide units (e.g., starch, glycogen, cellulose, chitin).
  • Mitochondria: Organelle in body cells that generates energy (ATP).
  • ATP (Adenosine Triphosphate): Chemical substance that body cells use to store/release energy, produced in mitochondria. Vitamin C is needed with ATP production.
  • Insulin: Hormone that regulates energy use from food (especially glucose), produced in the pancreas.
  • Diabetes 1: The immune system attacks insulin-producing cells in the pancreas, thus requiring daily insulin intake.
  • Diabetes 2: Not enough insulin production; lifestyle, age often play a role in development/ management.
  • Metabolic Pathway (Digestive Tract): Digestion starts in the mouth and ends at the anus. Includes: Mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum, anus.
  • Measuring Energy in Food: Energy measured in calories (Cal or kilocalories). Carbohydrates and proteins are 4 calories per gram, and fat 9 calories per gram.
  • Daily Calorie Needs: Varies based on size, activity level, and if trying to gain/lose weight.
  • Food before/after training: Recommendations for pre/post workout meals and fluids.
  • Vagus Nerve: Plays a role in digestion speed, transmitting signals between the gut and brain.
  • Glycemic Index: Measures how quickly carbohydrates are absorbed into the blood. High GI carbs are absorbed quickly, and low GI carbs are absorbed slowly.
  • Proteins: Building blocks of body tissues, comprised of amino acids.
    • Complete proteins: Contain all essential amino acids (e.g., meat, fish, milk, eggs, soy).
    • Incomplete proteins: Lack one or more essential amino acids (e.g., grains, nuts, beans).
  • Fats: Important for bodily functions, insulation, and energy storage; composed of fatty acids, including:
    • Unsaturated fats: Healthy fats, (Mono)unsaturated fats have (1 or more) carbon bonds.
    • Saturated fats: Less healthy fats .
    • Trans fats: Processed fats.
  • Omega-3 fatty acids: Essential fatty acids, important for reducing inflammation. Healthy fats (e.g., salmon, walnuts, spinach, eggs).
  • Omega-6 fatty acids: Essential fatty acids but should be consumed in moderation, as too much can stimulate inflammation.
  • Omega-9 fatty acids: Non-essential fatty acids that play a protective role against heart disease.
  • Cholesterol: Fat-like substance important for cell function and hormone production. Good(HDL) cholesterol and bad(LDL) cholesterol ratio should ideally be 5:1.
  • Vitamins: Organic compounds needed in small amounts for bodily functions. Types:
    • Water-soluble vitamins: Dissolve in water (e.g., vitamin C, B vitamins).
    • Fat-soluble vitamins: Dissolve in fat (e.g., vitamins A, D, E, K).
  • Minerals: Inorganic compounds needed for bodily functions (e.g., calcium, magnesium, iron, zinc).

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Description

This quiz covers key concepts in nutrition studied in Year 2, including the role of glycogen, types of fiber, and carbohydrates. Focus on their functions, sources, and impacts on health. Test your understanding of how these macronutrients support the body's energy and digestive processes.

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