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When molecules pass through a cell membrane using special proteins called transport proteins?
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What has to be present for Pyruvate to enter the mitochondria?
The mitochondrial membrane has special transporter proteins which are needed to transport pyruvate. This transport also requires ATP.
A special molecule that uses energy to push molecules through a membrane of a cell is called?
Transport protein
What molecule compose the cell membrane?
A cellular membrane — including plasma membrane and internal membrane — is made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains. Creative Biogene
What are special doorways in the cell membrane?
Proteins are too large to move across the phospholipid bilayer of the cell membrane so therefore require help getting into (or out of) the cell. Proteins may be brought across the cell membrane by endocytosis - they may then be broken down into amino acid building blocks (by fusion of the endocytotic vesicles with the proteolytic enzyme containing lysosomes) which can then be used by the cell or moved out of the cell by transmembrane transport proteins.
A type of passive transport across a cell membrane that requires special carriers is?
Active transport
What has to be present for Pyruvate to enter the mitochondria?
The mitochondrial membrane has special transporter proteins which are needed to transport pyruvate. This transport also requires ATP.
A special molecule that uses energy to push molecules through a membrane of a cell is called?
Transport protein
What would happen if materials could not move across the cell membrane?
Isolation. And most materials can NOT move across the cell membrane. (For many things your cells have special proteins within the membrane for transport.)
What molecule compose the cell membrane?
A cellular membrane — including plasma membrane and internal membrane — is made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains. Creative Biogene
What are special doorways in the cell membrane?
Proteins are too large to move across the phospholipid bilayer of the cell membrane so therefore require help getting into (or out of) the cell. Proteins may be brought across the cell membrane by endocytosis - they may then be broken down into amino acid building blocks (by fusion of the endocytotic vesicles with the proteolytic enzyme containing lysosomes) which can then be used by the cell or moved out of the cell by transmembrane transport proteins.
What proteins act like selective passageways in the cell membrane?
The lipid bilayer is a tightly packed membrane of hydrophobic (dont like water) molecules, so only hydrophobic or very very small molecules can go directly through it. Large molecules such as hormones need to have a special hole in the membrane that they can fit through, but some are so large that if the membrane created a plain old hole, everything would be able to fit through, even things the cell doesnt want. The proteins create special openings that allow only a specific variety of molcule to go through, like only a special type of hormone. They work a lot like a lock and key, so when the molecule encounters its protein, it acts like a key and opens the portal. once the molecule passes, the protein closes the opening and nothing else can go through.
What does active transport mean in medical terms?
active transportation is the one that requires energy. passive transportation doesn't require energy and particles move because of differences of concentration - it's diffusion and osmosis. most common energy source in cells is ATP, also ADP and AMP. active transportation also requires special proteins in cell membrane. those proteins use energy to transport iones and molecules from one side of membrane to another.
What process is when molecules pass through the cell membrane using special proteins?
In many instances,that is active transportation.But some times they are involved in facilitaed diffusion.
How does the cell get things in and out of it?
Water and gasses by diffusion, almost everything else by either active transport or special tunnels through the cell membrane (these are all specialized proteins).
What is the difference between passive and active transport across the cell membrane?
Wouldn't it be that active transport requires enegry and passive doesn't? Passive transport occurs when the concentration of something on one side of membrane is different from the concentration on the other side. It occurs when that substance can pass through the membrane, and always in the direction of more -> less. No energy is required to make the substance move; in fact, this movement generates energy. This is like rolling a rock down a hill--it just does it on its own. Active transport occurs in the opposite direction, from less -> more. It requires energy for transport. This is like rolling a rock up a hill--you have to push it the entire way! Both involve the transport of a substance across a membrane, and the change in concentrations on different sides of a membrane. Both are also important to the proper functioning of a cell. Active transport requires energy, but passive transport requires none. Active transport requires a special protein to make the transport occur, but passive transport requires none.
Does osmosis require membrane proteins?
No, osmosis is a special type of diffusion in which a water molecule is able to passively transport through a membrane without a protein. Although it is polar, it's extremely small size makes this possible
Does facilitated diffusion require the use of special membrane proteins?
no
