Quote: Nil Putters @ September 4 2008, 9:12 PM BST
You should get back to it imo. I wish I'd tried harder when revising (long, long ago). You can fudge around on here anytime.
Or are you taking a break?
I'm going to fall asleep if I do any more, and don't really want to recite "H+ ions pumped out, creating an electrochemical gradient and negative charge within the guard cell, thus opening the K+ ion channels. This causes a [K+] gradient, reducing the water potential gradient, and meaning water surges into the guard cell, increasing its volume. With the easily flexible outer membrane, and the stiffer inner membrane, this causes the guard cells to bend, opening the stomata." at 9.15 at night, for the 5th time.