Question

A normal human being requires how many calories per day?
A. 2500 k.cal
B. 4000 k.cal
C. 5000 k.cal
D. 686 k.cal

Answer 1

Hint: A calorie is a unit that measures energy. The calorie requirement of each individual is different. People have different metabolism that burns energy at different rates according to their lifestyle.

Complete answer:
Human body requires calories to live. Without energy, the cells of the body would die, the normal functioning of the organs will get disrupted. People obtain this energy from the food they consume. If people consume the required calorie every day they can lead a healthy life. Too much or too little calories will eventually lead to health problems. Not only the calorie, but the substance from which the calories are taken is also important. A normal human being needs about 2500 k.cal per day to meet his or her energy needs.
However, the calorie intake depends on several factors. The factors include age, height, current weight, activity levels, metabolic health, and several others.
The calorific value of three main foods that are carbohydrate, protein, and fat
Carbohydrates – 4 kcal in 1 gram
Protein – 4 kcal in 1 gram
Fat – 9 kcal in 1 gram
Empty calories are those that provide energy but have very low nutritional value. The parts of food that provide empty-calorie values are dietary fiber, amino acid, dietary minerals, or vitamins.
Calories are not only linked to weight gain and obesity they were also needed for proper health. Health issues occur when people consume more than the recommended amount. When one consumes high-calorie foods they should also consider their physical activity. High-calorie intake can be countered with high-intensity exercise.

The correct option is A. Hence the amount of calories needed for a human being is about 2500.

Note:Calories refers to the energy people get from food and which is used for physical activity. The main source of energy for a human being is carbohydrates which provide 4 kcal per gram and also energy is derived from protein and fat. The main source of energy for the brain is glucose.