A) 20-30% greater surface area to volume ratio
B) 50-60% greater surface area to volume ratio
C) 20-30% smaller surface area to volume ratio
D) 50-60% smaller surface area to volume ratio.
Correct Answer: A
Solution :
: A biconcave disk is to achieve a maximum surface area to cytoplasmic volume ratio. The surface area of an erythrocyte is calculated to be\[128\text{ }u{{m}^{2}},\] thus, the average person has 3840 \[{{m}^{2}}\]of RBC membrane area for respiratory exchange. The cell is enclosed in a typical fluid, bilayered cell membrane which is flexible and elastic enough to allow the cell to move through capillaries. Cells frequently assume a cup shape in capillaries. Peripheral membrane proteins, spectrin and actin, serve a cytoskeletal function.
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