Emergency Medical Technician (EMT) Intermediate Practice Exam

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Prepare for the Emergency Medical Technician (EMT) Intermediate Test with focused study methods including flashcards and multiple-choice questions. Practice with hints and detailed explanations to boost your readiness for the exam.

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What is the most common solvent in the human body?

Alcohol
Glycogen
Water
Salt solution

The correct answer is: Water

Water is the most common solvent in the human body, accounting for about 60% of an adult’s body weight. It serves as a crucial medium for chemical reactions and is essential for various physiological processes, including nutrient transport, waste elimination, and temperature regulation. Water facilitates the movement of substances in and out of cells, ensuring that metabolic functions can occur effectively. It also plays a vital role in maintaining cellular structure and function. The other options do not fulfill the role of a solvent in the body to the same extent as water. Alcohol, while it can dissolve certain substances, is not a primary solvent and can be toxic in high amounts. Glycogen is a stored form of glucose and serves as an energy reserve rather than acting as a solvent. Salt solutions, while they are important for electrolyte balance and cellular function, they are not the primary component of the body's fluid makeup like water. Thus, water is recognized as the universal solvent in biological systems due to its unique properties and prevalence in the human body.