Instructions
- Read the passage "Fueling the Human Engine" carefully.
- Complete Section 1: Reading Comprehension by answering the multiple-choice and short-answer questions.
- Complete Section 2: Nutrient Breakdown Chart using information from the text and your own healthy choices. Refer to the provided example row.
- Complete Section 3: PE & Real-World Application to design a meal plan for physical activity.
- Try the optional Bonus Challenge if you finish early!
- Check your work against the Answer Key at the end when finished.
Reading Passage: Fueling the Human Engine
Think of your body as a high-performance sports car. Just like a car needs the right quality of gasoline to run smoothly, your body needs the right mixture of nutrients from food to move, think, grow, and repair itself. Nutrition is the science of how food affects your health and physical performance.
Food contains six essential categories of nutrients, divided into two main groups: Macronutrients (nutrients your body needs in large amounts) and Micronutrients (nutrients needed in smaller amounts).
The Energy Providers: Macronutrients
- Carbohydrates (Carbs): Carbohydrates are your body's primary fuel source. When you eat foods like oats, rice, fruit, or whole-grain bread, your digestive system breaks them down into a simple sugar called glucose. Glucose travels through your bloodstream to supply quick energy to your muscles and brain. During high-intensity physical activity—like sprinting or playing basketball—your body relies mostly on carbohydrates.
- Proteins: Built from smaller units called amino acids, proteins act as the body's building blocks. They are responsible for building, repairing, and maintaining muscle tissue, skin, and organs. After a tough physical workout or sports practice, eating protein helps rebuild tiny tears in your muscles, making them stronger over time. Foods rich in protein include chicken, eggs, beans, fish, and tofu.
- Fats: Although fats often get a bad reputation, healthy fats (like those found in avocados, nuts, seeds, and olive oil) are vital. Fats store long-term energy, protect your vital organs, and help insulate your body to keep you warm. They also help your body absorb certain vitamins.
The Body Regulators: Micronutrients & Water
- Vitamins & Minerals: These micronutrients do not give you calories for energy directly, but they are essential for releasing the energy from macronutrients. For example, Calcium (a mineral) strengthens your bones for jumping and running, while Vitamin C helps your immune system fight off sickness.
- Water: Over 60% of your body is made of water! Water carries nutrients through your blood, flushes out waste, cools you down through sweat during exercise, and prevents dehydration, which can cause fatigue and muscle cramps.
When you eat, your digestive system breaks down food into these nutrients, which enter your bloodstream and are carried directly to cells to keep your body running at its peak potential.
Section 1: Reading Comprehension
Part A: Quick Recall
Circle or highlight the correct answer for each question.
-
What is the body's primary and fastest source of energy during intense activity?
- A) Protein
- B) Carbohydrates
- C) Calcium
- D) Vitamin C
-
Which nutrient is made of amino acids and helps repair muscle tissue after exercise?
- A) Glucose
- B) Water
- C) Protein
- D) Fat
-
What main role does sweating play during physical exertion?
- A) Rebuilding broken muscle fibers
- B) Cools the body down to maintain temperature
- C) Delivering glucose to cells
- D) Digesting fats for long-term storage
Part B: Vocabulary & Text Analysis
Answer the following questions in 1-2 complete sentences.
-
Context Clues: Based on the text, define what a macronutrient is in your own words.
Response: ___
-
Cause and Effect: Explain what happens to muscle tissue during a hard workout and how protein helps it recover.
Response: ___
Section 2: Nutrient Breakdown Chart
Fill in the blank rows of the table below. Identify a food, state its primary nutrient type, describe what it does inside the body, and explain how it improves physical performance in PE or sports. Row 1 is provided as an example.
| Food Item | Primary Nutrient | Function in the Body | PE / Athletic Benefit |
|---|---|---|---|
| Oatmeal with Bananas | Carbohydrates | Breaks down into glucose for quick cell energy | Provides sustained stamina for a long jog or soccer match |
| 1. Grilled Chicken Breast | |||
| 2. Avocado & Almonds | |||
| 3. Glass of Milk | |||
| 4. Fresh Orange Slices | |||
| 5. Cold Water |
Section 3: PE & Real-World Application
Scenario: Alex is a 14-year-old student preparing for a 3-mile run in PE class at 2:00 PM. At 12:00 PM, Alex eats a lunch consisting only of a small bag of greasy potato chips and a sugary soda.
-
Analyze: Why is this lunch poor fuel for Alex's 3-mile run? (Hint: Consider energy levels, digestion, and nutrients).
Response: ___
-
Design a Better Meal: Plan a balanced lunch for Alex that includes at least three different essential nutrients to ensure peak performance during the run.
- Chosen Foods: _____
- Carbohydrate Source (For Fuel): ____
- Protein Source (For Support/Repair): ___
- Hydration Source: _____
-
Justify: Explain in 2 sentences why your proposed meal will help Alex perform better in PE class.
Response: ___
Bonus Challenge (Optional)
Myth vs. Fact: Some people believe that drinking caffeinated energy drinks is the best way to hydrate before exercise.
Using what you learned about water and nutrients, write a short paragraph (3-4 sentences) explaining why plain water or an electrolyte drink is a safer, better choice for a young athlete than a high-sugar energy drink.
Response: ___
Answer Key
Section 1: Reading Comprehension
- B) Carbohydrates
- C) Protein
- B) Cools the body down to maintain temperature
- Sample Answer: A macronutrient is a nutrient that the body requires in large amounts to get energy and function properly, such as carbs, proteins, and fats.
- Sample Answer: During a workout, muscles develop tiny micro-tears. Protein provides amino acids that rebuild these tears, making muscles stronger.
Section 2: Nutrient Breakdown Chart
(Accept reasonable variations in student responses)
| Food Item | Primary Nutrient | Function in the Body | PE / Athletic Benefit |
|---|---|---|---|
| Oatmeal with Bananas | Carbohydrates | Breaks down into glucose for energy | Sustained stamina for a long jog |
| 1. Grilled Chicken Breast | Protein | Rebuilds and repairs muscle tissue | Helps muscles recover after strength training |
| 2. Avocado & Almonds | Healthy Fats | Provides long-term energy storage & protects organs | Keeps energy stable during long activities |
| 3. Glass of Milk | Minerals (Calcium) / Protein | Builds strong bones and repairs muscle | Prevents bone injury and aids recovery |
| 4. Fresh Orange Slices | Vitamin C / Carbs | Boosts immunity and provides quick glucose | Quick energy boost before or during workouts |
| 5. Cold Water | Water / Hydration | Regulates body temp and carries nutrients | Prevents muscle cramps, fatigue, and overheating |
Section 3: PE & Real-World Application
- Sample Answer: Chips and soda contain high amounts of unhealthy fats and simple sugars. The sugar will cause a quick spike and crash in energy before the run, while greasy chips digest slowly and can cause stomach cramps during physical exertion.
- Sample Answer:
- Foods: Whole wheat turkey wrap, apple slices, water.
- Carbohydrate: Whole wheat bread and apple.
- Protein: Turkey slice.
- Hydration: Water.
- Sample Answer: This meal provides complex carbohydrates that release steady energy for the 3-mile run without causing an energy crash. The water ensures Alex stays hydrated and avoids muscle cramps while running.
Bonus Challenge
Sample Answer: Plain water is best because it hydrates cells directly without added sugars or chemicals. Energy drinks contain high sugar levels and caffeine, which can lead to rapid heart rates, stomach discomfort, and sudden energy crashes during exercise. Water keeps body temperature regulated safely without negative side effects.