Algonquin College Health Program Assessment (AC-HPAT) Practice Exam

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What is plasma in the context of blood?

  1. The cellular component of blood

  2. The liquid component of blood

  3. The part that carries oxygen

  4. The solid component of blood

The correct answer is: The liquid component of blood

Plasma is the liquid component of blood and plays a vital role in the circulatory system. It accounts for about 55% of total blood volume and is primarily composed of water, electrolytes, proteins, hormones, nutrients, and waste products. Its function is critical because it serves as a medium for transporting various substances throughout the body, including glucose, electrolytes, and proteins, which are essential for maintaining homeostasis. The proteins in plasma, such as albumin, globulins, and fibrinogen, are crucial for processes like maintaining osmotic pressure, immune responses, and blood clotting. Together with red blood cells, white blood cells, and platelets, plasma ensures that oxygen and nutrients reach cells while facilitating waste removal. Understanding plasma's composition and function is essential for comprehending various physiological processes and the overall health of an individual.