0
cell membrane is a lipid bi-layer which allows only fat soluble sunstances to pass through and the remaining essential materials pass with the help of carrier protien..so on this basis the transport is of two types
(1) active transport: Active transport uses energy
(2) passive transport : does not use any energy
check it out : active-transport
Wiki User
∙ 13y ago
Wiki User
∙ 15y agoTransport across the cell can happen in several different ways, and some of those ways are: -filitated diffusion, diffusion, going with a constant gradient, etc.
Wiki User
∙ 14y agoPassive transport and Active transport. Geez I'm a seventh grader and I know that!
Wiki User
∙ 9y agoThe two forms of transport of molecules through the cell membrane are active and passive transport
Wiki User
∙ 11y agoDiffusion, facilitated diffusion, osmosis, and active transport are ways that molecules can cross the cell membrane.
Wiki User
∙ 14y agoActive transport and passive transport
Add your answer:
Earn +20 pts
How easy or hard is it for polar molecules to pass through the cell membrane?
Polar molecules are effectively charged molecules. It's hard for them to cross the cell membrane because the membrane is comprised of an uncharged phospholipid bilayer. Charged molecules tend to have specific protein channels that allow them to cross the membrane.
When a protein channel allows molecules to cross through the cell membrane?
when a protein channel allows molecules to cross through the cell membrane this is called facilitated diffusion. many might mistake this for diffusion which is the process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated.
What are the three biological molecules in the cell that DNA must be separated from?
The three biological molecules in the cell that DNA must be separated from are the cell membrane, lipids, and enzymes. The DNA is found in the nucleus of the cell.
Molecules can pass through the cell membrane of the human cell?
The molecules that can pass through the cell membrane of the human cell include water. Other molecules include fat soluble vitamins.
How does Oxygen cross cell membrane?
Oxygen and water molecules can penetrate the cell membrane due to small gaps that are created by the lipid molecules. Lipid molecules overlap each other which makes the gaps. The oxygen and water molecules then enter in the gaps. The cell membrane in this case is semi permeable.
How easy or hard is it for polar molecules to pass through the cell membrane?
Polar molecules are effectively charged molecules. It's hard for them to cross the cell membrane because the membrane is comprised of an uncharged phospholipid bilayer. Charged molecules tend to have specific protein channels that allow them to cross the membrane.
What is a factor that determines whether a molecules can cross a cell membrane?
mass
Can steriods and cholesterol cross the cell membrane on their own?
Yes because the cell membrane allows non polar molecules through
How do most molecules cross the cell membrane?
Diffusion or if the molecules are too large they go through the transport proteins.
Why do you have diffusion?
so molecules can use protein channel to cross a cell membrane-cleo
How is the membrane permeability?
means that the cell membrane has some control over what can cross it, so that only certain molecules either enter or leave the cell
How membrane is selectively permeable?
means that the cell membrane has some control over what can cross it, so that only certain molecules either enter or leave the cell
The proccess by which a protein channel allows molecules to cross the cell membrane is called?
Facilitated diffusion
When a protein channel allows molecules to cross through the cell membrane?
when a protein channel allows molecules to cross through the cell membrane this is called facilitated diffusion. many might mistake this for diffusion which is the process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated.
What are the three biological molecules in the cell that DNA must be separated from?
The three biological molecules in the cell that DNA must be separated from are the cell membrane, lipids, and enzymes. The DNA is found in the nucleus of the cell.
How do small molecules get through the cell membrane against a concentration?
How do small molecules get through a cell membrane
Molecules can pass through the cell membrane of the human cell?
The molecules that can pass through the cell membrane of the human cell include water. Other molecules include fat soluble vitamins.
