How is diffusion involved in Photosynthesis and Mammalian Respiration?

Question

One way each please.

All i need now is how diffusion is involved in Photosynthesis

Answer 1

Diffusion of carbon dioxide and oxygen take place in the alveolar of the lungs. Since there is a higher concentration of oxygen in the alveolar sac as compared to the capillaries surrounding it, the oxygen goes from the higher concentration to that of the lower concentration. The carbon dioxide is more concentrated in the capillary blood than the alveoli. so it diffuses into the lungs.

In photoynthesis water must diffuse into the plant or bacterial cell. It is then destroyed in what is commonly called the light reactions. It is separated into Hydrogen ions and oxygen. The oxygen is released into the air via diffusion and the Hydrogen ions are used to produce ATP. Since the water is used up more is needed to keep the process up. So more water diffuses into the cell. In order for tthe palnt to make food from the carbon dioxide that has diffused into the cell as well. It must enter the chloroplast. Here the Dark reactions of the process occur. The carbon dioxide is used up along with some of the ATP to make sugar. SO as the sugar is made and relocated this creates a carbon dioxide deficit in the chloroplast. So more Carbon dioxide diffuses into it. This continues until the process stops or the plant dies.

Answer 2

If a mix to two molecules are made to pass thro a semi permeable (selectively permeable),membrane then diffusion takes place-the molecule with higher permeability moves thro'the membrane and finds equilibrium with the the molecules on the other side.
In mammalian respiration,the carbon dioxide produced in the cells diffuses into the blood stream where it gets bound to hemoglobin and then dissolves (minor pathway)into plasma.In the lungs they pass across the alveloar membrane and out into the respiratory space of the lung.The reverse is the transport of oxygen where a high concentration of oxygen in the inspired air causes the oexygen to diffuse into blood bind to hemoglobin and dissolve in plasma and get carried into the cells.
Note that there is a concentration gradient of the gases in both the places in lungs and at the tissue level.

I dont remember the photosynthesis pathway. Good luck :)

Answer 3

diffusion needs to occur in human and other mamals so that the air that enters the lungs and through the alveoli can pass throught the walls of the alveoli and go into the bloodstream

glad to help:juan