Question

cell homeostasis
which best describes dynamic equilibrium?
there is an uneven
distribution of particles
inside and outside the cell.
there is a difference in
concentration on either
side of the cell membrane.
particles are moving into
and out of the cell, but their
concentrations remain
stable.
a concentration gradient is
forcing water out of the cell
and particles into the cell.

Explanation:

Dynamic equilibrium in cell homeostasis means particles move (in and out) but concentrations stay stable. The option "Particles are moving into and out of the cell, but their concentrations remain stable" matches this. Other options describe concentration gradients (uneven distribution, difference in concentration, concentration gradient forcing movement) which are not dynamic equilibrium.

Answer:

The option: "Particles are moving into and out of the cell, but their concentrations remain stable"