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What is the characteristic of a cell membrane that controls which substances that can either enter and exit the cell?
Wiki User
∙ 7y ago
Selective permeable
Lorenza Kassulke
Lorine Boyle
Selective permeable
Skylar Hagenes
selective permeability
Wiki User
∙ 12y agoselective permeability
Wiki User
∙ 8y agoSelective permeable
Wiki User
∙ 12y agoproteins control in and out
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What Controls what moves in and out of the cell?
Cell membrane
What organelle moves substances across the cell in one direction?
The plasma membrane surrounding animal cells is where the exchange of substances inside and outside of cells takes place. Some substances need to move from the extracellular fluid outside cells to the inside of the cell, and some substances need to move from the inside of the cell to the extracellular fluid.Some of the proteins that are stuck in the plasma membrane help to form openings (channels) in the membrane. Through these channels, some substances such as hormones or ions are allowed to pass through. They either are "recognized" by a receptor (a protein molecule) within the cell membrane, or they attach to a carrier molecule, which is allowed through the channels. Because the plasma membrane is choosy about what substances can pass through it, it is said to be selectively permeable.
What does the plasma membrane do?
The plasma membrane is like the skin of the cell and lets only certain things in and out. It uses active and passive transport to let things in and out meaning that it uses energy only sometimes to let things in and out (this being active) and lets things move as they please at other time (this being passive)
What do trans-membrane proteins do?
I trans membrane protein is located in the plasma membrane. It can be found in organelles such as the endoplasmic reticulum or on the phospholipd bilayer surrounding cells. Each end of the protein (the C-terminus (COOH) or N-terminus (NH2)) is located on opposite sides of the membrane. For example if located in the membrane of the ER, one one end of the protein would be in the ER lumen and the other in the cells cytoplasm. The proteins are 'anchored' into the membrane by hydrophobic regions which are easily accommodated in the hydrophobic membrane.
What in the cell membrane aids in the movement of substances into and out of the cell?
The component that helps transfer substances across the membrane that I believe you are talking about, are the embedded protein channels. They help move larger particles across the cell membrane such as sodium because they are too large to move through the phospholipid bilayer.
What Controls what moves in and out of the cell?
Cell membrane
When there are different amount of substances on either side of cell membrane a gradient results?
osmosis
What organelle moves substances across the cell in one direction?
The plasma membrane surrounding animal cells is where the exchange of substances inside and outside of cells takes place. Some substances need to move from the extracellular fluid outside cells to the inside of the cell, and some substances need to move from the inside of the cell to the extracellular fluid.Some of the proteins that are stuck in the plasma membrane help to form openings (channels) in the membrane. Through these channels, some substances such as hormones or ions are allowed to pass through. They either are "recognized" by a receptor (a protein molecule) within the cell membrane, or they attach to a carrier molecule, which is allowed through the channels. Because the plasma membrane is choosy about what substances can pass through it, it is said to be selectively permeable.
When there are different amounts of a substance on either side of the cell membrane is a what gradient results?
When there are different amounts of a substance on either side of the cell membrane the gradient result is called the concentration gradient. The permeability of the cell membrane will determine which substances can easily pass through the cell causing a change to the concentration gradient.
What do the membrane proteins do?
They do several things, depending on what they are designed for. The plasma membrane is made up of proteins which are semi-permeable to the outside and hold the cytoplasm within the cell and help to either prevent or allow diffusion of various substances into or out of the cell. They may also form receptor sites along the membrane for the attachment of enzymes which facilitate diffusion of certain substances.
What controls which substances go in and out of cells?
Molecules in the cell membrane (plasma membrane) control which substances move or out of a cell.Phospholipids form a barrier to most compounds. To move through the phospholipid bilayer, molecules must be small and uncharged; examples are water, dissolved oxygen, and carbon dioxide. These move through the bilayer by diffusion(osmosis in the case of water).Other compounds must pass through proteins embedded in the phospholipid bilayer.Channel proteins allow the passage of molecules that are small enough and are not repelled by any charge around the pore (channel) of the protein. The movement of substances through channel proteins is called facilitated diffusion, being facilitated by the protein.Carrier proteins are highly selective, and move substances either by facilitated diffusion or by active transport, which requires energy. This energy may be supplied by the hydrolysis of ATP.
What is the role of the cell membrane in moving substance in and out of the cell?
The cell membrane is considered to be semipermeable. This means that it will let some substances through (either in or out), but others it won't. The cell membrane is considered to be 3 layers (lipid, protein, lipid) Certain proteins will help substances into the cell, but some they won't let in. Generally, smaller molecules (oxygen, water, CO2, etc.) will pass through easier than larger molecules (glucose, other sugars). Basically, the cell membrane determines what substances are allowed to pass it/out of the cell.
What cell membrane allows you to move in and out of a cell?
its is a permeable membrane which allows osmosis and diffusion of small molecules such as glucose, salts and mineral ions. In an animal cell, it cannot hold the cell turgid like plant cells can, and so it bursts when too much water has entered it. This is osmotic shock
When the two substances are put in the same container they do not attract each other. Why does this happen?
Either one or both of the substances are not magnetic.
Substances are either elements or mixture?
Substances are Either an element or a mixture
Chemicals that move in and out of cells by diffusion?
The cell cotains phospholipids ,proteins , and carbohydrates. Carbohydrates can be attached to either the phospholipids or the proteins in the cell membrane. Sometimes carbohydrates (sugars) are attached to cell membrane phospholipids and to cell membrane proteins
What do cells use to transport substances?
Some substances can go directly through the cell membrane, but other larger ones either go throuh channels or attach to a protein that aids them into the cell.
