객관식
In human physiology, what is the primary purpose of red blood cells (erythrocytes)?
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17. The Blood
Erythrocytes
객관식
Approximately how many erythrocytes (red blood cells) are present in one drop of whole blood (about 50 microliters) in a healthy adult?
A
About 250 million erythrocytes
B
About 25 thousand erythrocytes
C
About 25 billion erythrocytes
D
About 2.5 million erythrocytes
검증된 단계별 안내1
Step 1: Understand the average concentration of erythrocytes in whole blood. Typically, a healthy adult has about 5 million erythrocytes per microliter of blood.
Step 2: Identify the volume of blood in one drop, which is approximately 50 microliters.
Step 3: Use the formula to calculate the total number of erythrocytes in one drop: multiply the concentration of erythrocytes per microliter by the volume in microliters. Mathematically, this is expressed as: \(\text{Number of erythrocytes} = 5,000,000 \times 50\).
Step 4: Perform the multiplication to find the total erythrocytes in one drop, keeping track of the units to ensure accuracy.
Step 5: Interpret the result to match it with the closest option given in the problem, understanding that the number will be in the hundreds of millions range.
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