Multiple Choice
The most numerous formed element in blood are the ____________, and their function is ____________.
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17. The Blood
Introduction To Blood
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One molecule of hemoglobin can bind a maximum of __________ oxygen molecules.
A
two
B
eight
C
four
D
six
Verified step by step guidance1
Understand the structure of hemoglobin: Hemoglobin is a protein found in red blood cells, composed of four subunits, each containing an iron atom that can bind to one oxygen molecule.
Recognize the role of iron in oxygen binding: Each subunit of hemoglobin has a heme group with an iron ion (Fe²⁺) at its center, which is the site of oxygen binding.
Calculate the total oxygen binding capacity: Since there are four subunits in a hemoglobin molecule, and each can bind one oxygen molecule, the total capacity is four oxygen molecules.
Consider the physiological significance: The ability of hemoglobin to bind four oxygen molecules is crucial for efficient oxygen transport from the lungs to tissues throughout the body.
Review the options provided: Among the options given (two, eight, four, six), the correct answer is four, as it matches the total oxygen binding capacity of a hemoglobin molecule.
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