Diet

Summary

A diet is the food an animal eats daily, and a balanced diet includes all essential nutrients in the right proportions. Humans need five main nutrients: carbohydrates, proteins, fats, vitamins, and minerals, along with water and fiber. Proteins are crucial for building and repairing tissues, while carbohydrates and fats primarily provide energy. Vitamins and minerals support various bodily functions, and fiber aids digestion.

• Carbohydrates — provide energy Example: Staple foods like potatoes, wheat, and rice.
• Proteins — build and repair tissues Example: Meat, fish, eggs, and dairy products.
• Fats — store energy and protect organs Example: Cooking oils, meat, and dairy products.
• Vitamins — support various bodily functions Example: Vitamin C from citrus fruits, Vitamin D from sunlight.
• Minerals — essential for bones and blood Example: Calcium from milk, iron from red meat.
• Fiber — aids digestion and prevents constipation Example: Fruits, vegetables, and whole grains.
• Water — solvent for metabolic reactions Example: Drinking fluids and water-rich foods like fruits.

Exam Tips

Key Definitions to Remember

• Balanced diet: A diet containing all nutrients in correct proportions.
• Protein: Nutrient for growth and tissue repair.
• Carbohydrate: Primary energy source.

Common Confusions

• Confusing carbohydrates with proteins as energy sources.
• Misunderstanding the role of fats in the diet.

Typical Exam Questions

• Why is it important for the diet to contain all five essential nutrients? To provide balanced nutrition for growth, energy, and repair.
• Which nutrient is primarily responsible for providing quick energy? Carbohydrates.
• Which of the following foods is a good source of Vitamin C? Citrus fruits.

What Examiners Usually Test

• Understanding of balanced diet components.
• Functions and sources of different nutrients.
• Effects of nutrient deficiencies on health.