Chapter 3, Problem 3.47FU

(a)

Interpretation Introduction

Interpretation:

The total kilocalories corresponding to each meal needs to be determined.

Concept Introduction:

• Energy value or nutritional value of food is the amount of energy stored in 1 gram of the food material. It is expressed in terms of kcal/g or kJ/g
• The energy value varies across the food spectrum.

Answer to Problem 3.47FU

Breakfast = 270 kcal

Lunch = 420 kcal

Dinner = 440 kcal

Explanation of Solution

Breakfast:

Food consumed and the corresponding energy value:

1 Banana = 110 kcal

1 cup non-fat milk = 90 kcal

1 egg = 70 kcal

Total energy = 110 + 90 + 70 = 270 kcal

Lunch:

Food consumed and the corresponding energy value:

1 cup carrots = 50 kcal

3 oz grounded beef = 220 kcal

1 medium apple = 60 kcal

1 cup non-fat milk = 90 kcal

Total energy = 50 + 220 + 60 + 90 = 420 kcal

Dinner:

Food consumed and the corresponding energy value:

3 oz skinless chicken = 110 kcal

1 baked potato = 100 kcal

3 oz broccoli = 30 kcal

1 cup non-fat milk = 90 kcal

Total energy = 2(110) + 100 + 30 + 90 = 440 kcal

(b)

Interpretation Introduction

Interpretation:

The total kilocalories corresponding to each day needs to be determined.

Concept Introduction:

• Energy value or nutritional value of food is the amount of energy stored in 1 gram of the food material. It is expressed in terms of kcal/g or kJ/g.
• The energy value varies across the food spectrum.

Answer to Problem 3.47FU

Total energy per day = 1130 kcal

Explanation of Solution

Total energy for breakfast = 270 kcal

Total energy for lunch = 420 kcal

Total energy for dinner = 440 kcal

Total energy per day = 270 + 420 + 440 = 1130 kcal

(c)

Interpretation Introduction

Interpretation:

Whether Person C loses or gains weight needs to be determined based on the new diet.

Concept Introduction:

• Energy value or nutritional value of food is the amount of energy stored in 1 gram of the food material. It is expressed in terms of kcal/g or kJ/g
• The energy value varies across the food spectrum.

Answer to Problem 3.47FU

Person C will lose weight.

Explanation of Solution

It is given that Person C consumes 1800 kcal per day.However,based on the new diet, he will consume only 1130 kcal per. Since the new diet has a lower total calorie intake, it is likely that Person C will lose weight over time.

(d)

Interpretation Introduction

Interpretation:

The number of days taken by Person C in order to lose 5.0 lbs needs to be determined.

Concept Introduction:

• Energy value or nutritional value of food is the amount of energy stored in 1 gram of the food material. It is expressed in terms of kcal/g or kJ/g
• The energy value varies across the food spectrum.

Answer to Problem 3.47FU

Days taken to lose 5.0 lbs = 26 days

Explanation of Solution

Energy lost per day = 1800 -1130 = 670 kcal

  $\begin{array}{l}\text{Number of days taken to lose 1}\text{.0 lbs = }\frac{3500\text{ kcal }\times \text{ 1 day}}{670\text{ kcal}}=5.22\text{ days}\\ \text{Number of days taken to lose 5}\text{.0 lbs = }\frac{5.0\text{ lbs }\times \text{ 5}\text{.22 days}}{1.0\text{ lbs}}=\text{ 26 days}\end{array}$