Symptoms of the prolapsed uterus can include feeling like something is coming out even though you aren't having a baby, lower back pain, trouble using the bathroom and painful intercourse. Lower back pain has lots of causes, but I've never heard of this particular one.
Facilitated diffusion is a passive process: The solutes move down the concentration gradient and don't use extra cellular energy to move. Channel proteins are another type of facilitated diffusion that allow the selective transport of one type of hydrophilic molecule across the cell membrane.
Facilitated diffusion is diffusion using carrier or channel proteins in the cell membrane that assist in the movement of molecules across a concentration gradient. The third type of movement is known as osmosis, or the movement of water to equalize solute concentration.