Aim: Describe the nutrients that are needed by the human body. Topic: Nutrition Aim: Describe the nutrients that are needed by the human body. Do Now: Explain the three process involved in heterotrophic nutrition. http://www.youtube.com/watch?v=TTh93TuUEck&feature=related HW: Protist Activity due Monday. Five food labels due Wednesday.
What are nutrients? Substances in foods that provide energy and materials for life processes
How is energy measured in food? Calories: amount of heat needed to raise 1 kg of water 1°C How is energy measured in food?
6 nutrients needed by the body
1. Carbohydrates: main source of energy
Simple carbohydrates = sugars
Complex carbohydrates = starches & fiber
2. Proteins: for replacement & growth and repair of body cells
Made up of many amino acids Most are made in the body
Essential amino acids: 8 amino acids NOT made in the body
3. Lipids: fats Source of stored energy
Unsaturated fats: liquid at room temp Vegetable oils
Saturated fats: solid at room temp Associated with high cholesterol In meats, animal products, butter
4. Minerals: maintain bones, teeth, muscles and red blood cells Ex: Calcium, phosphorus, iodine…
5. Vitamins: maintain normal functioning of the body Disease prevention
6. Water: needed for maintenance of cytoplasm, blood and tissue fluid
http://www.brainpop.com/health/nutrition/nutrition/
1. How is energy measured in food? Review: 1. How is energy measured in food? 2. Identify the nutrient being described: Main source of energy Needed for repair and growth Needed for maintaining normal body functioning Makes up a large percentage of the blood and cytoplasm. Made up of sugars, starch and fiber. Stored source of energy. Maintain bones, muscles and red blood cells.