How do water, glucose, Na+ etc. get into and out of cells?

Question

How do water, glucose, Na+ etc. get into and out of cells?

Answer 1

facilitated diffusion.  Which does not use ATP.  A carrier protein binds to the glucose and changes shape which enables it to pass into the plasma membrane.  Water enters through proteins called aquaporins.  Na enters through sodium potassium pumps which is form of active transport and uses ATP.  But it can also diffuse across the plasma membrane (i think).

good luck

Answer 2

water gets into cells through "osmosis," which is just the diffusion (movement) of water through a selectively permeable membrane. water can get into a cell at any place. glucose and na+ have to go through special pathways (either with the flow as passive transport, or against the flow as active transport).

hope that helps!