Multiple Choice
How does particle size affect a molecule's ability to move across a cell membrane?
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6. The Membrane
Concentration Gradients and Diffusion
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What is the relationship between cell size and the rate of nutrient absorption in cells?
A
Cell size does not affect the rate of nutrient absorption.
B
Larger cells have a higher rate of nutrient absorption due to increased surface area.
C
Larger cells absorb nutrients more efficiently because they have more membrane channels.
D
Smaller cells have a higher rate of nutrient absorption due to a larger surface area-to-volume ratio.
Verified step by step guidance1
Understand the concept of surface area-to-volume ratio: As a cell grows, its volume increases faster than its surface area, affecting the efficiency of nutrient absorption.
Recognize that smaller cells have a larger surface area relative to their volume, which allows for more efficient nutrient absorption.
Consider the implications of cell size on nutrient absorption: Smaller cells can absorb nutrients more quickly because they have more surface area available per unit of volume.
Evaluate the options given: Larger cells may have more membrane channels, but the surface area-to-volume ratio is the key factor in nutrient absorption efficiency.
Conclude that the correct relationship is that smaller cells have a higher rate of nutrient absorption due to their larger surface area-to-volume ratio.
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