Qualified Medication Aides (QMA) Practice Exam

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What are ketones?

Vitamins in the body
Substances when carbohydrates are broken down
Substances made when the body breaks down fat for energy
Proteins made for muscle growth

The correct answer is: Substances made when the body breaks down fat for energy

Ketones are substances produced when the body breaks down fat for energy, especially in situations where carbohydrate intake is low. This process typically occurs during periods of fasting, prolonged exercise, or when a low-carb diet is followed. When carbohydrate stores are insufficient, the body shifts to utilizing fat as a primary energy source, leading to the production of ketones from fatty acids in the liver. This metabolic state is known as ketosis, and it can provide an alternative energy source for many cells, including brain cells that typically rely on glucose. Understanding ketones is essential, especially in the context of dietary management for conditions such as diabetes, where maintaining balanced energy levels is crucial. Thus, this option accurately describes the formation and function of ketones in the body.