Question

during the time that the particles are diffusing into the cell
multiple choice
the concentration of particles on the outside of the cell decreases.
a point is eventually reached where equal numbers are passing into and out of the cell.
the rate of this diffusion remains constant.
the rate of the diffusion begins slowly, but eventually accelerates.
the concentration of particles on the outside of the cell increases.

Explanation:

Diffusion is the movement of particles from an area of high - concentration to an area of low - concentration. As particles diffuse into the cell, the outside concentration decreases. Eventually, equilibrium is reached where equal numbers of particles are passing into and out of the cell. The rate of diffusion is not constant; it depends on the concentration gradient which changes over time.

Answer:

a point is eventually reached where equal numbers are passing into and out of the cell.