Nutrients — definition?
Substances in food essential for body functions.
Nutrients — definition?
Substances in food essential for health.
Digestive system — role?
Breaks down food and absorbs nutrients.
Main energy source?
Carbohydrates provide quick energy.
Combustion — mechanism?
Fuel reacts with oxygen, releasing heat and light.
Digestive process — start?
Begins in the mouth with mechanical and chemical digestion.
Energy measured in?
Kilojoules (kJ).
Balanced diet — components?
Carbohydrates, proteins, fats, vitamins, minerals, water.
Malnutrition — causes?
Nutrient deficiency or excess.
Enzymes in digestion — role?
Speed up breakdown of nutrients.
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1. What are nutrients in food?
2. What is the primary energy source for the human body, especially during physical activity?
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