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oxygen and carbon dioxide

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13y ago

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Gases diffuse most efficiently across a respiratory membrane if the membrane is?

thin and moist, with a large surface area and a large concentration gradient.


How plasma membrane diffuse across plasma membrane?

Ions can't diffuse across membranes, they must used channels to transport across


What kinds of molecules freely diffuse across a semipermeable membrane?

Water molecules freely diffuse across a semipermeable membrane.


How do you use diffuse in sentence?

Oxygen molecules diffuse across the membrane.


If a substance is able to diffuse across a membrane then the membrane is said to be what?

selectively permeable


What is the membrane said to be if a substance is able to diffuse across a membrane?

selectively permeable


If a substance is unable to diffuse across a membrane we say the membrane is?

osmotically active


Can oxygen diffuse across a cell membrane?

No, oxygen cannot directly diffuse across a cell membrane. Instead, it crosses the cell membrane with the help of specific transport proteins, such as aquaporins and oxygen channels. These proteins facilitate the movement of oxygen from areas of high concentration to low concentration.


Why does single celled organism not necessarily need a respiratory system?

Nutrients and gases can diffuse directly across the cell membrane, thereby eliminating a need for such a complex system. #hopeihelped :)


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.


Gases diffuse most efficiently across what?

Gases diffuse most efficiently across a thin membrane or barrier. This is because a thin membrane allows for quicker movement of gas molecules from an area of high concentration to an area of low concentration.


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

Its too large