Multiple Choice
Approximately how many erythrocytes (red blood cells) are present in one drop of whole blood (about 50 microliters) in a healthy adult?
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17. The Blood
Erythrocytes
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Which of the following best describes the primary function of erythrocytes (red blood cells)?
A
Transporting oxygen from the lungs to body tissues
B
Regulating blood pressure
C
Producing antibodies to fight infections
D
Initiating blood clotting processes
Verified step by step guidance1
Understand the role of erythrocytes: Erythrocytes, or red blood cells, are specialized cells in the blood primarily responsible for transporting gases throughout the body.
Identify the main component of erythrocytes: Hemoglobin is the protein in red blood cells that binds to oxygen in the lungs.
Consider the process of oxygen transport: Oxygen binds to hemoglobin in the lungs and is then released to body tissues where it is needed for cellular respiration.
Evaluate the options: Compare the primary function of erythrocytes with the given options. Consider which option aligns with the role of transporting oxygen.
Conclude with the correct function: Recognize that the primary function of erythrocytes is to transport oxygen from the lungs to body tissues, distinguishing it from other functions like regulating blood pressure, producing antibodies, or initiating blood clotting.
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