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There is a need for glucose inside a cell but the glucose molecule is too large to pass through the cell membrane How does the cell solve this problem?
It transports the glucose through transport proteins.
Does the size or the speed of a molecule determines whether it can pass through the pores of a membrane?
The speed doesn't necessarily determine the permeability, but the size does. Smaller molecules such as O2 can easily enter the cell while CO2 leaves the cell. There are other criteria that also determines whether a molecule can pass through the plasma membrane such as its solubility. Fat soluble molecules such as steroids can easily pass through the membrane.
Define receptor of body?
A receptor is located on a cell membrane. Any neuronic transmission, hormone, etc. that cannot get inside of the cell's membrane will sit on the receptor in order to pass its message along to the cell. When the molecule sits on the receptor, it causes a series of reactions to occur inside of the cell. From the series of reactions that occur inside of the cell, the message is passed along, and the cell will perform as indicated by the molecule on the cell receptor.
Which the two structure in plant cell are selectively permeable allowing molecules of water and small solutes to pass through but preventing the passage of large solute molecule?
Cell membrane and sap vacuole membrane
What are two factors that determine whether or not molecules can pass through a selectively permeable membrane?
One factor is the channel of the molecule, without them the ions and polar molecules would not be able to pass across. Another factor is the size of the molecule, they determine how fast it will defuse.
When does passive transport occurs?
It occurs when there are more of that certain molecule on the outside of the cell than the inside. When this is the case, the molecule will automatically pass through the membrane without the cell using energy.
There is a need for glucose inside a cell but the glucose molecule is too large to pass through the cell membrane How does the cell solve this problem?
It transports the glucose through transport proteins.
There is a need for glucose inside a cell but the glucose molecule is too large to pass through the cell membrane. How does the cell solve this problem?
It transports the glucose through transport proteins.
What structure allows only certain things to pass in and out of a cell?
The cell membrane. It is a semi-permeable membrane (or selectively permeable membrane) - this means that it only lets certain certain molecules or ions pass in or out of the cell. Permeability may depend on the molecule's size, solubility, properties, or chemistry.
Does the size or the speed of a molecule determines whether it can pass through the pores of a membrane?
The speed doesn't necessarily determine the permeability, but the size does. Smaller molecules such as O2 can easily enter the cell while CO2 leaves the cell. There are other criteria that also determines whether a molecule can pass through the plasma membrane such as its solubility. Fat soluble molecules such as steroids can easily pass through the membrane.
Why can starch molecules not pass through dialysis tubing?
It is a complicated molecule. the starch molecule is to large to be transported through the cell membrane. it therefore has to be broken down if it is to go though the protein channels.
Does the heat energy pass from molecule to molecule?
yes, if heat didn't pass from one molecule to another, nothing would not be hot or warm.
What type of molecule embedded in the cell membrance allows larger molecule to pass through the membrance by active transport?
Transport proteins allow the active transport of large molecules through the cellular membrane.
State one possible reason a certain substance cannot pass across a cellmembrane?
One possible reason behind the inability of a certain substances to pass across a cell membrane is molecule size.
Define receptor of body?
A receptor is located on a cell membrane. Any neuronic transmission, hormone, etc. that cannot get inside of the cell's membrane will sit on the receptor in order to pass its message along to the cell. When the molecule sits on the receptor, it causes a series of reactions to occur inside of the cell. From the series of reactions that occur inside of the cell, the message is passed along, and the cell will perform as indicated by the molecule on the cell receptor.
Why can oxygen diffuse across a cell but a protein cannot?
Oxygen is much smaller than a protein.proteins are too largeDifference in size
Which the two structure in plant cell are selectively permeable allowing molecules of water and small solutes to pass through but preventing the passage of large solute molecule?
Cell membrane and sap vacuole membrane
