A spherical cell with which diameter could respond most quickly to a chemical change in the surrounding fluid (all else being equal)?
A) 10$\mu$m
B) 20 $\mu$m
C) 1 $\mu$m
D) 2,000 nm
E) All cells would respond with equal speed.

Question

Quizplus · Accepted Answer

The smaller the diameter of the cell, the faster the response time. This is because smaller cells have a higher surface area-to-volume ratio, allowing for more efficient exchange of molecules with the surrounding fluid. Therefore, a spherical cell with a diameter of 1 μm would respond most quickly to a chemical change in the surrounding fluid.

A Spherical Cell with Which Diameter Could Respond Most Quickly μ\muμ

A Spherical Cell with Which Diameter Could Respond Most Quickly $\mu$