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What controls the passage of molecules in and out of the cell?
Cell membrane controls the passage of molecules in and out of the cell through selective permeability. This allows specific molecules to pass through while preventing others from entering or exiting the cell. The cell membrane contains protein channels and pumps that regulate the movement of ions and molecules.
What does selectively perminable mean?
"Selectively permeable" refers to a membrane that allows certain substances to pass through while blocking others. This selective permeability is important for regulating the passage of molecules in and out of cells.
What is a small protein channel that allows the passage of ions and small molecules between cells?
A gap junction is a small protein channel that allows the passage of ions and small molecules between cells. Gap junctions play a crucial role in facilitating communication and coordination between cells.
What allows the passage of small molecules between animal cells?
Gap junctions allow the passage of small molecules and ions between animal cells. They consist of protein channels that connect the cytoplasm of adjacent cells, facilitating communication and the exchange of signaling molecules.
What do you understand by terms semi permeable?
A semi-permeable membrane is a membrane that allows certain substances to pass through while preventing others from crossing. It selectively permits the passage of molecules based on size and charge. This property is crucial in biological processes such as osmosis and filtration.
Fenestrated capillaries have?
Pores (fenestrae) through the cells that allows the passage of large molecules such as protiens.
What is ultra filtration?
The filtration of a colloidal substance through a semipermeable medium that allows only the passage of small molecules.
What controls the passage of molecules in and out of the cell?
Cell membrane controls the passage of molecules in and out of the cell through selective permeability. This allows specific molecules to pass through while preventing others from entering or exiting the cell. The cell membrane contains protein channels and pumps that regulate the movement of ions and molecules.
Which structure in the wall of continuous capillaries allows for the passage of molecules into and out of the vessel?
intercellular clefts
What structure is required for osmosis?
A partially permeable membrane is required for osmosis to occur. This membrane allows the passage of solvent molecules (usually water) while preventing the passage of solute molecules.
When some molecules go through a membrane faster than others the membrane is what?
The membrane is said to be selectively permeable or semipermeable when some molecules can pass through it faster than others. This property allows the membrane to regulate the passage of specific substances.
What does it mean for a cell membrane to be selectively permeable?
A selectively permeable cell membrane allows certain molecules or ions to pass through while restricting the passage of others. This selective permeability helps regulate the movement of substances in and out of the cell, maintaining internal conditions necessary for cellular functions.
Why does osmosis require a semipermeable membrane?
Semi permeable membrane means a very thin layer of material which allows some molecule to pass through them and prevent some molecule to pass through them. Osmosis is the passage of water from a dilute solution via a membrane which is semi permeable to a more concentrate solution. So the membrane should be semi-permeable so as to only allow the movement of H2O molecules and not the other molecules of the mixture.
What does selectively perminable mean?
"Selectively permeable" refers to a membrane that allows certain substances to pass through while blocking others. This selective permeability is important for regulating the passage of molecules in and out of cells.
What is a small protein channel that allows the passage of ions and small molecules between cells?
A gap junction is a small protein channel that allows the passage of ions and small molecules between cells. Gap junctions play a crucial role in facilitating communication and coordination between cells.
What allows the passage of small molecules between animal cells?
Gap junctions allow the passage of small molecules and ions between animal cells. They consist of protein channels that connect the cytoplasm of adjacent cells, facilitating communication and the exchange of signaling molecules.
What is a tunnel like passage through a bone called?
A tunnel-like passage through a bone is called a canal or a meatus. This structure allows for the passage of nerves, blood vessels, or other structures through the bone.
