When guard cells are preforming photosynthesis, what happens to the sugar and water concentrations? and how is this an example of homeostasis? thanks a lot
while the guard cells swell up, the outer partitions are thinner and swell out greater, this motives the cells to handle a kidney bean shape. This leaves a hollow interior the middle, this entire is widespread because of the fact the stomata. So the respond is A; the stomata opens
This is a hard question to answer, primarily because it is difficult to isolate the far less numerous guard cells and thereby differentiate between photosynthesis in guard cells vs ordinary leaf cells, so specific research on the topic is hard to come by and often somewhat contradictory. A few things are known: Guard cells do contain chloroplasts, albeit fewer in number and smaller in size than other leaf cells. It is assumed that they do provide a significant energy source for the guard cell, so it is not dependent on surrounding cells. It has been demonstrated that the ATP produced by guard cell chloroplasts is used by the cell membrane to control ion transport systems that ultimately drive the opening and closing of stomata. When the stomata close, it results in a reduction in water loss for all cells. Conversely, when they open, water loss occurs, but CO2 is taken in for processing by all the photosynthetic cells (daytime) and O2 for for respiration (nighttime). In order to close, water is taken into the cell, so sugar concentrations go down even though some sugar may be still produced in tiny amounts. As to the question of homeostasis, I would look at that as a homeostatic condition of the plant as a whole. The control of water loss/CO2 intake/O2 intake is essential to the continued homeostasis of all of the cells of the plant in question. I do understand that this is a complicated answer, but the question is equally complicated and not completely defined by the current state of research on the topic.
