HL Chemistry - Option B: Human Biochemistry. Diet & Nutrition. The Human Body & Its Requirements. Nutrients – The food components which provide growth, energy, and replacement of body tissue There are SIx Groups of Nutrients – proteins carbohydrates fats/lipids vitamins minerals
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HL Chemistry - Option B: Human Biochemistry
Diet & Nutrition
A balanced diet is the key to good health!
milk –Vitamin D
margarine – vitamin A
flour – Vitamin B
juices – Vitamin C
osteoporosis – lack of Ca
anemia – lack of Fe
Goiter – lack of I
Muscle cramps – lack of Na
Example of a multidentate ligand called porphyrin
Mechanism of Action:
(The uneven distribution of cation charges across the cell membrane is responsible for nerve impulse transmission)
Sample Calculation #1A large apple weighs 150 g. If a 15 g sample of the apple is completely combusted, the temperature of 200 g of calorimeter water raises by 45.3° C. The heat capacity of the calorimeter is 89.1 J/°C and the specific heat of water is 4.184 J/g-° C.What is the caloric value of the apple?
ΔH = heat absorbed by water + heat absorbed by calorimeter
ΔH = (m x C x ΔT)water + (C x ΔT)calorimeter
ΔH = (200 g x 4.184 J/g-°C X 45.3 °C) + (89.1 J/°C x 45.3 C)
ΔH =41 943 J
ΔH = 41 943 J x (1 cal/4.184 J)
ΔH = 10 025 cal
ΔH = 10 025 cal x ( 1 Cal/1000 cal)
ΔH = 10 nutritional calories (Cal)
ΔH = (10 Cal/15 g of apple) x (150 g of apple)
ΔH = 100 Cal
Sample Calculation #2A person eats a meal consisting of 10 g of fat, 20 g of carbohydrate, and 10 g of protein. Given that fat = 9 Cal/g, carbohydrate = 4 Cal/g, and proteins = 4 Cal/g.How many nutritional calories (Cal) did this person consume?
ΔH = (m x c)fat + (m x c)carbohydrate + (m x c)protein
ΔH = (10 g x 9 Cal/g) + (20 g x 4 Cal/g) + (10 g x 4 Cal/g)
ΔH = 210 Cal