0
What else can I help you with?
What prevents charged molecules from diffusing across the cell membrane?
This depends on the membrane. For example, the plasma membrane of a eukaryotic cell allows many ions to passively diffuse. However, the prevention of ions across a membrane indicates that the membrane in question is most likely non-polar, meaning that they are hydrophobic. Non-polar molecules do not like to mix with polar molecules like ions, therefore they repel one another and active diffusion must be used to transport ions across a non-polar membrane.
What does a carrier protein do in the process of transporting molecules across a cell membrane?
A carrier protein helps transport molecules across a cell membrane by binding to specific molecules and changing shape to move them across the membrane.
How do carrier proteins facilitate the passive transport of molecules across a membrane?
Carrier proteins facilitate the passive transport of molecules across a membrane by binding to specific molecules on one side of the membrane and changing shape to transport the molecules across to the other side. This process does not require energy and is driven by the concentration gradient of the molecules.
Does facilitated diffusion require energy for the movement of molecules across the cell membrane?
No, facilitated diffusion does not require energy for the movement of molecules across the cell membrane.
Does facilitated diffusion require energy for the transportation of molecules across the cell membrane?
Facilitated diffusion does not require energy for the transportation of molecules across the cell membrane.
How does the material move from the respiratory system to the circular system?
Material moves from the respiratory system to the circulatory system by diffusing across a membrane in the air sacks called alveoli.
How would sugar enter a cell that has a low concentration of particles get through a cell membrane and into a cell wall?
By diffusing across the protein membrane.
What is the process of water diffusing across a what membrane?
Water diffuses across a cell membrane through a process called osmosis. Osmosis is the movement of water molecules from an area of high water concentration to an area of lower water concentration, driven by the concentration gradient of solutes across the membrane. This process helps maintain the cell's internal environment and balance the concentration of solutes inside and outside the cell.
What prevents charged molecules from diffusing across the cell membrane?
This depends on the membrane. For example, the plasma membrane of a eukaryotic cell allows many ions to passively diffuse. However, the prevention of ions across a membrane indicates that the membrane in question is most likely non-polar, meaning that they are hydrophobic. Non-polar molecules do not like to mix with polar molecules like ions, therefore they repel one another and active diffusion must be used to transport ions across a non-polar membrane.
What does a carrier protein do in the process of transporting molecules across a cell membrane?
A carrier protein helps transport molecules across a cell membrane by binding to specific molecules and changing shape to move them across the membrane.
What kinds of molecules freely diffuse across a semipermeable membrane?
Water molecules freely diffuse across a semipermeable membrane.
What large molecules are unable to cross the plasma membrane?
Large molecules such as proteins, polysaccharides, and nucleic acids are generally unable to pass through the plasma membrane without assistance from transport proteins or other mechanisms. The size and charge of these molecules prevent them from diffusing across the membrane's hydrophobic interior.
Why can oxygen diffuse across a cell membrane but a protein can?
Its too large
The fatty acid tail region of the phospholipids prevent soluble molecules from entering the cell?
Yes, the fatty acid tails of phospholipids are hydrophobic, which means they repel water-soluble molecules. This property creates a barrier that prevents those molecules from freely diffusing across the lipid bilayer of the cell membrane.
When molecules are moving back and forth across the membrane will they ever stop moving?
Yes, in an isotonic solution the movement of molecules across the membrane will stop.
What is the process When proteins help molecules move across the membrane is called?
when proteins help molecules move across the membrane, it it called Facilitated Diffusion
How do carrier proteins facilitate the passive transport of molecules across a membrane?
Carrier proteins facilitate the passive transport of molecules across a membrane by binding to specific molecules on one side of the membrane and changing shape to transport the molecules across to the other side. This process does not require energy and is driven by the concentration gradient of the molecules.
