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

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13y ago
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14y ago

ions and cytoplasm

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11y ago

amino acids and gluctose

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11y ago

oxygen

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Q: What are 2 substances that diffuse freely across a cell membrane?
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Related questions

Can oxygen diffuse across a cell membrane?

Yes, how else would our cells obtain oxygen?


What kinds of molecules freely diffuse across a semipermeable membrane?

Water molecules freely diffuse across a semipermeable membrane.


What is the solubility theory of membrane permeability?

the solubility theory of membrane permeability simply describes that a membrane can only be freely permeable to substances that can dissolve in it. this was the most basic theory posed to explain how substances passed through membranes of cells. another way of explaining this is that substances that can freely or passively diffuse across membranes when they have the same chemical or physical properties as the membrane.


Why is it important that a cell membrane does not allow all dissolved substances to diffuse freely through it?

magnets


What substance is most likely to passively diffuse across the plasma membrane by dissolving in the membrane?

Lipid-soluble molecules such as O2 and CO2 diffuse freely through the plasma membrane.


What does not freely diffuse through the plasma membrane?

glucose


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

H2O CO2 O2 hope this helps


What term identifies the concept that some substances can move freely across a cell membrane while other substances must be carried across by proteins?

selective permeability


What Substances that can freely dissolve through the plasma membrane are made of?

Substances that can freely pass through the plasma membrane must be small and non-polar.


What is made from lipids and diffuse freely into cells through the plasma membrane?

protiens


Do peroxisome have membrane?

Yes, peroxisomes have their own membrane. The membrane helps to keep the enzymes within the organelle from interacting freely with the other intracellular substances.


Facilitated diffusion sentence?

Facilitated diffusion is a type of diffusion specifically for larger molecules, to help them cross a selectively permeable membrane with the help of integral proteins that act as carriers. Facilitated diffusion is a passive process, i.e. it does not need energy/ATP.