New York State Emergency Medical Technician (EMT) Practice Exam

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What is hemoglobin responsible for in the body?

Transporting cells throughout the body
Formation of clots when vessel damage occurs
Carrying oxygen within red blood cells
Producing blood components in response to infection

The correct answer is: Carrying oxygen within red blood cells

Hemoglobin is a critical protein found in red blood cells, and its primary function is to carry oxygen from the lungs to the tissues throughout the body. This process is essential for maintaining cellular metabolism and providing energy for various bodily functions. The structure of hemoglobin allows it to bind to oxygen molecules effectively, enabling efficient transport and release of oxygen where it is needed. Additionally, hemoglobin plays a role in transporting carbon dioxide, a waste product of metabolism, back to the lungs for exhalation, which is crucial for maintaining the body’s pH balance and overall homeostasis. The effectiveness of hemoglobin is vital for sustaining cellular life and overall health, making its role in oxygen transport fundamental to the functioning of the circulatory and respiratory systems.