Biology Illinois Edition (Glencoe Science)
Biology Illinois Edition (Glencoe Science)
7th Edition
ISBN: 9780078759864
Author: Alton Biggs
Publisher: MCG
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Chapter 35, Problem 37A
Summary Introduction

To analyze:

The general trend regarding the amount of calories needed according to the age to maintain the energy.

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 consumes. 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.

Expert Solution & Answer
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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 a resting state. 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. In the case of kids, from ages 6-12 they should consume 1600 to 2,200 calories per day, while for toddlers of age 2 years should have 1000-1400 calories per day.

Conclusion

The amount of consumption of calories should reduce with the increase in age. People age 50-60 should have low calories in comparison to the 19-30 years age people.

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