Which of the following yields the greatest caloric value per gram?
a. Fats
b. Proteins
c. Carbohydrates
d. All are equal in caloric value.

Guida verificata passo dopo passo

Step 1: Understand that the caloric value per gram refers to the amount of energy released when the macronutrient is metabolized by the body.

Step 2: Recall the general caloric values for each macronutrient: fats provide about 9 calories per gram, proteins provide about 4 calories per gram, and carbohydrates also provide about 4 calories per gram.

Step 3: Compare these values directly to determine which macronutrient yields the greatest energy per gram.

Step 4: Recognize that fats have more than double the caloric value per gram compared to proteins and carbohydrates.

Step 5: Conclude that among the options, fats yield the greatest caloric value per gram.

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Caloric Value of Macronutrients

Caloric value refers to the amount of energy released when a macronutrient is metabolized. Fats, proteins, and carbohydrates each provide different amounts of energy per gram, which is essential for understanding their role in nutrition and energy balance.

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Energy Density of Fats

Fats are the most energy-dense macronutrient, providing about 9 kilocalories per gram. This higher energy density means fats yield more calories compared to proteins and carbohydrates, which is important when considering dietary energy sources.

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Introduction to Energy

Caloric Content of Proteins and Carbohydrates

Proteins and carbohydrates both provide approximately 4 kilocalories per gram. Despite their similar caloric values, their metabolic roles differ, with proteins primarily used for tissue repair and carbohydrates mainly serving as a quick energy source.

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