Question

The human body uses a variety of organic molecules as sources of energy. In what order does the body usually access these sources of energy? lipids, carbohydrates, proteins proteins, lipids, carbohydrates carbohydrates, proteins, lipids carbohydrates, lipids, proteins

Answer 1

Ans.

Human body gets energy by the breakdown of complex organic molecules, such as carbohydrates, proteins, and fat molecules by the process of respiration. During respiration, energy is released in the form of ATP, which is used for the various metabolic functions.

The primary source for the energy is carbohydrate molecules, followed by lipids. When all the available carbohydrates and fats are used in respiration, some amino acids present molecules are used as source of energy.  

Thus, the correct option). is 'carbohydrates, lipids, proteins.'

Answer 2

There are 3 sources of energy, which are also known as macronutrients ,carbohydrates, protein, and fat.

Of these three, carbohydrates are the body’s preferred source of energy. Carbohydrates break down into glucose, which is an immediate source of energy especially for the brain and muscles. The macronutrient proportions recommended for general, healthy diet are: 45-65% of energy (or calories) from carbohydrates, 10-20% of energy (or calories) from protein and 20-35% of energy (or calories) from fat.