1. Table 4 below compares the compositions of human and bovine milk.

Calculate the caloric value per litre of each kind of milk. Which one provides more energy per unit volume?

2. It is frequently recommended that a lactating woman should consume an extra 500 kcal/day, in addition to her normal diet. If she is producing 2 L/day of milk, what is her expected weight change per day?

Table 4 Nutrient (g/L) Human Cow Protein 11 35 Fat 45 37 Carbohydrate (lactose) 68 49