Anatomy and Physiology II Practice Test

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Prepare for the Anatomy and Physiology II Exam with engaging quizzes. Study with flashcards and detailed questions, accompanied by explanations. Ensure your readiness for the test and boost your confidence to succeed!

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Which component of blood is primarily responsible for transporting oxygen and carbon dioxide?

Platelets
Leukocytes
Erythrocytes
Plasma

The correct answer is: Erythrocytes

Erythrocytes, also known as red blood cells, are the primary component of blood responsible for the transportation of oxygen and carbon dioxide. They contain hemoglobin, a protein that binds to oxygen in the lungs and carries it to tissues throughout the body. This binding allows erythrocytes to effectively deliver oxygen where it is needed for cellular respiration. Simultaneously, erythrocytes pick up carbon dioxide, a waste product produced by cells, and transport it back to the lungs for exhalation. Other components of blood serve different functions. Platelets are crucial for blood clotting and wound healing, playing no role in gas transport. Leukocytes, or white blood cells, are primarily involved in the immune response and protecting the body against infections, rather than in the transportation of gases. Plasma is the liquid portion of blood that contains water, electrolytes, proteins, and other substances, but it does not transport oxygen or carbon dioxide directly; it serves more as a medium for carrying these gases in solution. Thus, erythrocytes stand out as the key players in the task of transporting respiratory gases.