Question

select all that apply
the rate of diffusion of a substance across the plasma membrane depends on which of the following?
the amount of cholesterol in the membrane
how easily the substance can cross the membrane
the concentration of the substance outside the cell
the availability of atp within the cell
the concentration of the substance inside the cell

Explanation:

Diffusion is a passive process that doesn't require ATP. The rate depends on membrane - permeability (how easily the substance can cross), and concentration gradients (concentration inside and outside the cell). Cholesterol can affect membrane fluidity and thus permeability.

Answer:

The amount of cholesterol in the membrane
How easily the substance can cross the membrane
The concentration of the substance outside the cell
The concentration of the substance inside the cell