Question

As water "Enters" the guard cells, what happens to the stoma?
and on the flip side..
As water "Leaves" the guard cells, what happens to the stoma?

I am so confused by these..

Answer 1

What are you thinking about when you say what happens?

Answer 2

are we talking cellular effect or molecular effect?

Answer 3

All I know is that when guard cells take in water from neighboring cells by osmosis they become more turgid. The changes in turgor pressure in guard cells results primarily from the reversible absorption and loss of potassium. The stroma open when guard cells actively accumulate potassium from neighboring epidermal cells.
The flow of potassium across the plasma membrane of the guard cell is coupled to the generation of a membrane potential by proton pumps.
The absorption of potassium causes the water potential to become more negative within the guard cells, and the cell become more turgid as water enters by osmosis.

Answer 4

stoma opens as water enters and leaves