Yes, how else would our cells obtain oxygen?
CO2, H2O, and O2 can all diffuse across a cell membrane. Also, small polar molecules (uncharged) and hydrocarbons easily diffuse across.
Its too large
Proteins are to large or Oxygen is much smaller than a protein.
H2O CO2 O2 hope this helps
Substances that are small, nonpolar, and uncharged will diffuse through a membrane easily. This includes gases like oxygen and carbon dioxide, as well as small lipophilic molecules. Larger or charged molecules may require assistance from transport proteins to cross the membrane.
CO2, H2O, and O2 can all diffuse across a cell membrane. Also, small polar molecules (uncharged) and hydrocarbons easily diffuse across.
Its too large
Carbon dioxide, oxygen and some nonpolar molecules diffuse easily.
Oxygen and carbon dioxide get into and out of cells via diffusion. The gases diffuse across the thin capillary wall, and then diffuse across the cell membrane.
Proteins are to large or Oxygen is much smaller than a protein.
H2O CO2 O2 hope this helps
In general, molecules that cannot diffuse across the cell membrane are either very large, such as starches and fats, or very polar.
Its too large
Oxygen
Glucose is too big to pass through.
Oxygen is a small, non-polar molecule that can passively diffuse across the lipid bilayer of a cell membrane. Proteins, on the other hand, are larger and more complex molecules that cannot pass through the hydrophobic core of the membrane. Instead, proteins are transported into or out of cells through specific channels or transporters.
Glucose is too big to pass throught.