Gas exchange for photosynthesis - CO2 from the air diffuses into the leaf, and 02 diffuses out of the leaf into the air
Diffusion is the process by which small particles move from a place of high concentration to a place of lower concentration. By diffusion, small molecules like salts can go inside a cell from the outside. To keep itself alive, a Cell needs to take in many things from its outside. In Photosynthesis, gaseous Carbon Dioxide (CO2) enters the plant cell by diffusion. CO2 is very important in building food and making energy for the plants.
Before diffusion there is a higher concentration of oxygen molecules outside the cell than inside the cell. After diffusion the concentration of oxygen molecules is the same outside and inside the cell.
Higher solute concentration outside the cell than that inside causes net loss of water and plasmolysis occurs. This is due to the diffusion of water to areas of higher solute concentration.
If a plant cell is placed in fresh water, there will be a net movement of water into the cell - because the solute concentration inside the cell is greater than outside. This occurs because the system is attempting to reach equilibrium (where the concentrations inside and outside are equal). Unlike an animal cell, a plant cell will not burst when excess water enters the cell. This is because the cell wall helps the plant cell maintain its structure.
In the thylakoids in the grana which are located inside the chloroplasts in a plant cell inside of a plant, and some fungi.
Diffusion occurs on the cell membrane.
movement. In a cell.
photosynthesis occurs in chloroplast in the plant cell.
Diffusion across a cell membrane occurs when concentrations of a substance are higher either inside or outside the cell.
regulates diffusion
Osmosis and diffusion
Diffusion happens in every plant and animal cell. It occurs through the membrane of each and every cell in the organism.
Facilitated diffusion is diffusion that occurs not through the cell membrane directly but through protein channels within the cell membrane. They are often, although not always, substrate specific.
The plant cell absorbs water by simple diffusion and osmosis.
In plants that do not have tubes, like non-vascular plants, food and water are transported from cell to cell through a process known as simple diffusion. This movement occurs within the plant tissues and does not rely on specialized structures like xylem or phloem.
transpiration and diffusion through cell walls.Tranpiration is only for plant cells and animals cells do not have a cell wall. For animal cells there is diffusion and omosis through cell membranes.diffusion, osmosis, and facilitated diffusion
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