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Lipid-soluble molecules such as O2 and CO2 diffuse freely through the plasma membrane.
If there is the concentration of substance inside the cell is lesser than outside and cell membrane is permeable to the substance.
Size. Actually very few substances are able to diffuse across the menbrane, most must be transported ie facilitated diffusion, active transport, or receptor-mediated endocytosis. Carbon dioxide, oxygen, water, and some lipid substances are able to diffuse across the membrane
Diffusion across a membrane in biology is referred to as 'osmosis' & osmosis is the process by which solvent molecules move from a region of high conc. to low concentration and this can therefore occur only in one direction at a time for a perticular solution. this is a really smart answer im surprised
I believe the answer is when it is uncharged.
In your small intestine
an ion
Carbon dioxide because that exits through the lungs.
Large intestine
Methanogens would likely live in a bog a sewage treatment plant or a cows intestine. They can only be seen with a microscope and not naked eyes.
Methanogens would likely live in a bog a sewage treatment plant or a cows intestine. They can only be seen with a microscope and not naked eyes.
Methanogens would likely live in a bog a sewage treatment plant or a cows intestine. They can only be seen with a microscope and not naked eyes.