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What else can I help you with?
What is it called when a cell membrane closes around a molecule to allow the molecule to enter the cell?
selectively permiable membrane (you might want to double check that though...)
What is the process in which molecules move in and out of cell?
The process by which molecules move in and out of a cell is called cell transport. This can occur through passive processes like diffusion or facilitated diffusion, where molecules move along a concentration gradient, or through active transport, which requires energy to move molecules against a concentration gradient. Additionally, cells can also use endocytosis and exocytosis to engulf or expel larger molecules or particles.
What ways can cells move things by active transport?
. One method is that transport proteins in the cell membrane "pick up" molecules from outside the cell and carry them in, while using energy in the process. A second method is that the cell membrane surrounds a particle and takes it in.
What happens when sucrose is taken up by active transport?
Outside the cell is high concentration of hydrogen ions and low concentration of sucrose. Inside, is the opposite, low concentration of hydrogen ions, and high concentrations of sucrose. Cells use ATP to pump a hydrogen ion across the cell membrane, against the concentration gradient, and when the hydrogen ion goes to re-enter, it goes through a Sucrose-proton cotransporter. This means that the hydrogen ion (proton) take a sucrose molecule with it when it goes though the membrane.
Is protein synthesis a function of cell membrane?
No, protein synthesis is not a function of the cell membrane. Protein synthesis occurs in the ribosomes of the cell, which are located in the cytoplasm or on the rough endoplasmic reticulum. The cell membrane is mainly involved in regulating the movement of substances in and out of the cell.
Which membrane activities require ATP?
Active transport... Not anything passive though.
What is it called when a cell membrane closes around a molecule to allow the molecule to enter the cell?
selectively permiable membrane (you might want to double check that though...)
Can a solution pass though a membrane?
Yes, a solution can pass through a membrane depending on the size and structure of the molecules present in the solution. Small molecules like water and ions can typically pass through a membrane via simple diffusion, while larger molecules may require specialized transport mechanisms such as facilitated diffusion or active transport.
Can proteins pass through transport proteins?
No the soluble proteins can not pass though the transporters on the membrane. Transport proteins are highly specific they only allow the transport of ions such as Na or K across the cell. But transport proteins such as Hemoglobin can carry oxygen or CO2 to all the tissues for respiration.
Why is kidney dialysis a good example of the application of substance transport through the cell membrane?
Kidney dialysis involves the removal of waste products and excess fluid from the blood using a dialysis machine. It mimics the process of filtration and selective transport that occurs in the kidneys, where substances are transported across the cell membrane to maintain electrolyte balance and remove waste from the body. The dialysis membrane acts as a selective barrier that allows waste products and excess fluids to be removed while retaining essential nutrients and substances in the blood.
Why is energy required for facilitated diffusion?
because those that can't get through the membrane by themselves can get help. transport proteins give them a ride through the membrane. different transport proteins make it easier for certain molecules to get through the membrane without cell using energy
What is the process in which molecules move in and out of cell?
The process by which molecules move in and out of a cell is called cell transport. This can occur through passive processes like diffusion or facilitated diffusion, where molecules move along a concentration gradient, or through active transport, which requires energy to move molecules against a concentration gradient. Additionally, cells can also use endocytosis and exocytosis to engulf or expel larger molecules or particles.
How are oxygen and carbon dioxide exchanged in the Lings and though all cell membranes?
They enter/exit through a passive transport process called diffusion. It is caused by a concentration gradient within the two things being exchanged. The molecules diffuse across the membrane from the high concentration to the lower concentration side.
Does diffusion always have to be though a membrane?
yes
Is the cytoskeleton in the plasma membrane?
No. It is attached to the plasma membrane though, which is important. The cytoskeleton gives cells shape and rigidity etc and so it is important for it to be attached to the plasma membrane. The cytoskeleton is composed of molecules that are located in the cytoplasm but that are attached to the plasma membrane via specific proteins. Hope that helps!
Which molecules are moved into a cell against their concentration gradient the process is?
Always active transport when something is moved against it's concentration gradient. Excepting, perhaps cotrasport, though many biologists see active transport here also.
Are osmosis and endocytosis passive transports?
It is an active transport,Transport mechanisms fall into two catagories passive and active. Passive transport mechanisms do not require the cell to do work for the substance to enter or leave the cell. Instead the energy involved comes from the kinetic energy of the molecules in solution. Active transport mechanisms involve the cell to use cellular energy usually in the form of ATP to power special protein pumps to bring material into the cell.Passive transport mechanisms Active Transport mechanismsSimple diffusionOsmosisFacilitated DiffusionSimple protein channelsGated channelsActive transport via protein pumpsBulk flow mechanismsendocytosisphagocytosispinocytosisexocytosisThe passive transport mechanisms and the protein pump mechanisms involve movement of substances as single molecules across the membrane. The "bulk" flow mechanisms endocytosis and exocytosis enable the cell to take in very large packages of molecules...say a food item from the environment. Many books treat these bulk flow mechanisms as separate from active transport for that reason.
