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Certain substances, such as small molecules and ions, are able to cross the cell membrane. The ability of a substance to cross the membrane is determined by its size, charge, and solubility in the lipid bilayer of the membrane.

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5mo ago

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Related Questions

Does transported substances never physically cross the plasma membrane in endocytosis?

In endocytosis, transported substances are enclosed in vesicles formed from the plasma membrane, which do physically cross the plasma membrane. These vesicles then transport the substances into the cell.


What is a factor that determines of a molecule can cross a cell membrane?

Polarity


What is a factor that determines whether a molecules can cross a cell membrane?

mass


What part of the membrane indicates how easy it is for substances to cross?

Permeability


What is cell membrane permeability?

It is the ability of the membrane to allow ions and/or particles to cross.


How do cells control what goes in and out of the membrane?

Through the use of proteins. Most substances pass through the membrane with the aid of a protein and changing the shape or the frequence of that protein determines how much of the substance can cross.


Which is a factor that determines wether a molecule can cross the cell membrane?

Polarity


Is an ability of a plasma membrane to allow some substance to cross across the membrane more easily than others?

Yes, the ability of a plasma membrane to allow some substances to cross more easily than others is called selective permeability. This is due to the presence of specific transport proteins and channels that facilitate the movement of certain molecules while restricting others. The lipid bilayer of the membrane also plays a role in regulating which substances can pass through.


Which is a factor that determines wheathe a molecule can cross a cell membrane?

A key factor that determines whether a molecule can cross a cell membrane is its size and polarity. Small, nonpolar molecules, such as oxygen and carbon dioxide, can easily pass through the lipid bilayer, while larger or polar molecules often require specific transport proteins to facilitate their movement. Additionally, the concentration gradient and the presence of channels or carriers also influence a molecule's ability to cross the membrane.


What is a factor that determines whether a molecule cross a cell membrane?

size/ polarity can be the factors


Which is a factor that determies whether a mole can cross a cell membrane?

Lipid solubility determines if it will diffuse across. The presence of specific protein carrier molecules determines if it will be transported across the membrane.


What is membrane permeability?

Membrane permeability refers to the ability of molecules, substances, etc. to pass through the membrane. For example, the cell membrane is referred to as 'semi-permeable' because it allows some molecules (such as water) to enter, and stops other molecules (such as sodium ions) from passing through the membrane. If these want to get into the cell, they must then rely on proteins in the cell membrane to let them in.