It is controlled by a combination of the pressures/concentration gradients of the gases involved, and the guard cells of the stomata.
stomata
Note: Stomata is a plural word, stoma is the singular.
They are controlled by the guard cells.
The cell membrane
IT depends on what cell. In the plant cell it is the cell wall and the cell membrane. But in the animal cell it is only the cell membrane.
A microscope can be used for this.
Phospholipids permit lipid-soluble materials to easily enter or leave the cell by diffusion through the cell membrane. Phospholipids form a bilayer or double layer which makes up most of the membrane.
(brooke,13) water is soaked up through roots & carbon dioxide is just absorbed Carbon dioxide is absorbed by the following process. There is a spongy mesophyll, a loose tissue with many air spaces between its cells. These air spaces connect with the extrerior through stomata porelike openings in the underside of the leaf that allow carbon dioxide and oxygen to diffuse into and out of the leaf.
The openings where gases enter and leave plant leaves are called stomata's. These are crucial for the survival of plants.
pores in the leaves and stomates allow gases to enter and leave the plant
materials enter and leave the nucleus through openings in its cell wall and membrane
Cell Membrane
Cell Membrane
Scorpions breathe through four pairs of book lungs on the underside of the abdomen. Great link I found on scorpions for you. Click the link below labeled "scorpions"Scorpions have a six-segmented abdomen. On the underside of each of the last four segments are small paired openings called stigmata. These openings allow air to enter and leave the lung-sacs inside the abdomen.
== == Some Substance but not others to enter and leave a cell == == Some Substance but not others to enter and leave a cell
Stomata.
All bones have foramen in them. These are canals or openings through which nerves and blood vessels go.
cell membranes
Yes it does
Cell membrane