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The polar molecules goes through facillated diffusion. The molecules goes through the channel or membrane protein which then goes inside the cell.
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∙ 12y ago
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Why do Ions and polar molecules require transport proteins to enter or leave a cell?
Not necessarily. It helps to be polar because the lipid bilayer is polar and it helps to pull molecules through, but if its a molecule that the cell doesn't want it wont pull it through. Water (a polar molecule) can go through the membrane anywhere but other nutrients need the help of transport proteins.
What type of molecules enter the cell through passive transport List at least three?
They are molecules with low weights.Their surface charge must be very low. Water,some amino acids, some other chemicals enter this way
Which organelle has a semi permeable membrane and separates the cell from it's environment?
The cell membrane (or plasma membrane) shows semi-permeability. In short some substances, such as gases and small electrically-neutral molecules CAN pass, while others like glucose and other large polar molecules CANNOT pass. Although glucose and other large polar molecules cannot pass through the semi-permeable cell membrane, they may enter through the interior of transport proteins.
What brings nonspecific material into a cell?
Endocytosis is the process that brings nonspecific material into a cell. All cells of the body use this process as it helps transport large polar molecules into the cells.
Why is active transport of molecules necessary?
To move substances from low to high concentration.
What type of molecules cannot enter the cell?
polar molecules are repelled by the cells electrical charge.
How does the cell membrane regulate what enters and leaves the cell membrane?
Cell membrane have proteins embedded in them that act as channels for things to enter and leave the cell. Furthermore, the fact that the membrane is non-polar will block any polar molecules from entering but will allow non-polar molecules such as hormones to enter.
Why do Ions and polar molecules require transport proteins to enter or leave a cell?
Not necessarily. It helps to be polar because the lipid bilayer is polar and it helps to pull molecules through, but if its a molecule that the cell doesn't want it wont pull it through. Water (a polar molecule) can go through the membrane anywhere but other nutrients need the help of transport proteins.
What type of molecules enter the cell through passive transport List at least three?
They are molecules with low weights.Their surface charge must be very low. Water,some amino acids, some other chemicals enter this way
Describe the conditions needed for molecules to enter a cell passively?
The molecules should be small and non-polar, also the concentration radient on the outside of the cell should be higher .
Large molecules are surrounded by the cell membrane and enter the cell?
A large molecule that can not enter the cell through myosis enters the cell through by endocytosis. Endocytosis is an example of active transport.
Which substances passes most readily into a cell ions large molecules glucose carbon dioxide or polar molecules?
Ions
Which organelle has a semi permeable membrane and separates the cell from it's environment?
The cell membrane (or plasma membrane) shows semi-permeability. In short some substances, such as gases and small electrically-neutral molecules CAN pass, while others like glucose and other large polar molecules CANNOT pass. Although glucose and other large polar molecules cannot pass through the semi-permeable cell membrane, they may enter through the interior of transport proteins.
What is the process by which large molecules enter a cell through pouches in the membrane?
Phagocytosis
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.
What part of the membrane helps large carbohydrate molecules enter the cell?
Globular proteins
What are the substances that the cell membrane does not allows to pass?
Usually Ions and charged molecules (salts dissolved in water), large polar molecules (glucose), and macromolecules.
