Chapter 35, Problem 38A

Summary Introduction

To analyze:

The reason behind the people with age 19-30 needs more calories.

Introduction:

The calories are described as the amount of energy an individual needed to raise the temperature of one gram of water through 1 degree Celsius. It depends on the type of food a person eats to determine the number of calories consumed. The weight of the people will determine the number of calories one should consume or not. The body energy that one is used depends on how much active the person will be, next, it depends on the efficiency of the body to use the energy, and it also depends on the age of the person.

Explanation of Solution

Around 20 percent of the energy that a person consumes is used in the metabolism process of the brain. Most of the remainders are used in basal metabolism, the resources a person used in the blood circulation, digestion, respiration process while he or she is resting. Depending on age, the number of calories one should consume is different from the increase in age. The calories in the food should decrease. A person of age 25-30 should consume about 2,400 calories a day; the age up to 60 should consume 2,000 calories, while the person of age 19-25 should take 2,600 calories per day. A person of age 19-30 needs the highest number of calories as they are physically active and use more energy compare to the person in fifties or sixties.

Conclusion

Thus, the person of age 19-30 need more calories because they are physically active and use more energy in compare to person with older age.