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Yes, how else would our cells obtain oxygen?

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13y ago

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What are 2 substances that diffuse freely across a cell membrane?

CO2, H2O, and O2 can all diffuse across a cell membrane. Also, small polar molecules (uncharged) and hydrocarbons easily diffuse across.


Why can oxygen diffuse across a cell membrane but a protein?

Its too large


What molecule is able to easily diffuse across the cell's membrane?

Carbon dioxide, oxygen and some nonpolar molecules diffuse easily.


What causes oxygen to enter and carbon dioxide to leave the capillaries?

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.


Why can oxygen diffuse across a cell membrane but a protein cannot-?

Proteins are to large or Oxygen is much smaller than a protein.


Name 3 particles that are small enough to diffuse freely across the cell membrane?

H2O CO2 O2 hope this helps


What large molecules need help getting across cell membrane?

In general, molecules that cannot diffuse across the cell membrane are either very large, such as starches and fats, or very polar.


Why can oxygen diffuse across a cell membrane but a protein can?

Its too large


Which particles can diffuse easily througn a cell membrane?

Oxygen


What explains why oxygen molecules diffuse across a cell membrane while glucose molecules do not?

Glucose is too big to pass through.


Why can oxygen diffuse across a cell membrane but a protein can't?

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.


Why oxygen molecules do not across a cell membrane while glucose molecules do not?

Glucose is too big to pass throught.