Multiple Choice
Which part of the protein hemoglobin binds and transports oxygen in the blood?
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17. The Blood
Erythrocytes: Hemoglobin
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Which component of the blood is primarily responsible for transporting oxygen to body tissues?
A
Hemoglobin within erythrocytes (red blood cells)
B
Leukocytes (white blood cells)
C
Platelets (thrombocytes)
D
Plasma proteins (e.g., albumin)
Verified step by step guidance1
Step 1: Understand the components of blood and their primary functions. Blood consists mainly of erythrocytes (red blood cells), leukocytes (white blood cells), platelets, and plasma with proteins.
Step 2: Identify the role of erythrocytes. These cells contain hemoglobin, a protein specialized in binding and transporting oxygen from the lungs to body tissues.
Step 3: Recognize that leukocytes are primarily involved in immune defense, not oxygen transport.
Step 4: Note that platelets are responsible for blood clotting and do not carry oxygen.
Step 5: Understand that plasma proteins like albumin help maintain osmotic pressure and transport some substances, but they do not transport oxygen.
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