food groups notes

Food Groups

  • Definition: All living organisms need food to provide energy for life processes.

  • Plants:

    • Make their own food through photosynthesis using sunlight, water, and carbon dioxide.

  • Animals:

    • Cannot produce their own food; they must eat plants or other animals.

  • Human Requirement:

    • Humans need to consume both plant and animal products for energy, growth, and development.

Classification of Food Groups

  • New Vocabulary:

    • Classification, carbohydrates, proteins, vitamins, nutrition, pyramid, immune system, insulate.

  • Food Groups:

    • Four main food groups:

      1. Carbohydrates

      2. Proteins

      3. Fats and oils

      4. Vitamins and minerals

Carbohydrates

  • Function:

    • Primary source of energy for the body.

  • Storage:

    • Store energy for future use.

  • Structural Role:

    • Significant part of the body's structure.

  • Source Foods:

    • Pasta, samp, potatoes, cereal, mealie meal, porridge, bread.

Proteins

  • Function:

    • Building blocks for muscle development.

  • Repair:

    • Help to repair damaged tissues.

  • Energy Reserve:

    • Can serve as energy if carbohydrates are scarce.

  • Source Foods:

    • Meat, fish, chicken, eggs, beans, milk, cheese, chickpeas, lentils, nuts, soya.

Vitamins and Minerals

  • Essential Role:

    • Vital for bodily functions, few produced by the body.

  • Important Minerals:

    • Sodium: Regulates water balance, found in most foods.

    • Calcium: Strengthens bones and teeth, found in fish, green vegetables, milk, and cheese.

  • Sources:

    • Most vitamins come from plants or supplements.

  • Vitamin Functions:

    • Vitamin A: Eye health.

    • Vitamin B: Chemical reactions in breathing.

    • Vitamin C: Immune system support.

    • Vitamin D: Aids calcium absorption.

Food Pyramid

  • Definition: A graphic representation for a healthy balanced diet, illustrating food types by levels.

  • Diet Guidelines:

    • Small amounts at the top (oils, sweets).

    • Moderate amounts in the middle (fruits, vegetables).

    • Larger amounts at the bottom (breads, pasta, rice).

  • Unhealthy Diets:

    • Some individuals eat an unbalanced diet, prioritizing sweets and fats over essential food groups.

Diseases from Unhealthy Diet

  • Key Terms:

    • Nourishment, overeat, obesity, diabetes.

  • Challenges:

    • Many lack access to a balanced diet due to various circumstances.

  • Consequences:

    • Health issues arise from lack of balance in food intake.

Causes of Poor Diet

  1. Diseases and Infections:

    • Chronic illnesses impact nutrition absorption.

  2. Dietary Preferences:

    • Cultural preferences lead to unbalanced diets in certain regions.

  3. Economic Factors:

    • Poverty and high food prices restrict access to diverse food groups.

  4. Food Shortages:

    • Famine and poor agricultural practices limit food availability.

Health Problems

  • Tooth Decay:

    • Caused by excessive sugar, leading to cavities.

  • Constipation:

    • Painful and often diet-related.

  • Obesity:

    • Condition of excessive weight for age/height.

  • Diabetes:

    • Impaired blood sugar usage affecting energy levels.

  • Anorexia Nervosa:

    • Life-threatening condition of self-induced starvation.