it14spr201.20ac5t30-44.txt

Equilibrium related to movement through space

A difference in concentration of a substance between 2 places

Uneven distribution of electrical charge

Diffusion through a membrane is directly proportional to the surface area & concentration gradient and inversely proportional to the thickness of a membrane and its resistance

The combination of electrical and concentration gradients

Channels whose opened state is controlled by binding to a chemical ligand Chemically gated channels

Movement of molecules across cell membranes in response to a concentration gradient w/ the aid of a membrane protein

Movement across membrane w/ the aid of a protein transporter

Membrane protein that binds to the molecule it transports

Membrane protein that forms water filled channels to link (ICF) and (EFC) compartments

A channel that opens and closes in response to stimuli

Gated opened, allows ions to move back & forth across the membrane w/o regulation

Maybe specific for one ion or may allow ions of similar size and change to pass

Are made from a protein called aquaporin

Move molecules across membranes.