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Passive and active transport?
Passive transport does not require energy to move molecules across a cell membrane, relying on concentration gradients, while active transport requires energy in the form of ATP to move molecules against their concentration gradients. Passive transport includes diffusion, facilitated diffusion, and osmosis, while active transport involves pumps, such as the sodium-potassium pump, and vesicle transport mechanisms like endocytosis and exocytosis.
What Word Goes in There As cell size goes effectiveness of diffusion and osmosis goes This drives the cells to stay small?
Surface area. As cell size increases, the surface area to volume ratio decreases. This decreased ratio makes it harder for nutrients and waste to diffuse in and out of the cell, driving cells to stay small for efficient diffusion and osmosis.
Is facilitated diffusion type of active transport?
No, facilitated diffusion is a type of passive transport in which molecules move across a cell membrane with the help of specific transport proteins. Active transport, on the other hand, requires energy to move molecules against their concentration gradient.
What is the movement of molecules from areas of higher concentration to lower concentration until equilibrium is met?
The movement of particles from an area of high concentration through a semi-permeable membrane to an area of low concentraton is the process of diffusion. I'm sorry but I do not think that answer is good enough. It is a form of diffusion, where only small particles, small enough to pass through the membrane can get through. When I was in school the statement above was the definition of osmosis, the whole point being it was diffusion through a semi-permeable membrane, selecting for only small enough particles. It seems some time between 1992 and 2003 the definition was changed to the movement of water, and not particles and now in 2010 the definition is the movement of solvents. I would like to know how and why the definition osmosis was changed, why and what is the justification? I would also like to know why the original meaning of osmosis, which made perfect sense, has been changed to "it's the definition of diffusion and not osmosis any more", when in fact it isn't a clear enough word to describe the process? Surely the new definition of osmosis is also diffusion?
What is the difference between facilitated diffusion with help of the carrier molecule and active transport with help of a transport protein?
Facilitated diffusion with a carrier molecule allows molecules to passively move down their concentration gradient without energy input, using a specific carrier protein. Active transport, on the other hand, requires energy in the form of ATP to move molecules against their concentration gradient using a specific transport protein.
Passive and active transport?
Passive transport does not require energy to move molecules across a cell membrane, relying on concentration gradients, while active transport requires energy in the form of ATP to move molecules against their concentration gradients. Passive transport includes diffusion, facilitated diffusion, and osmosis, while active transport involves pumps, such as the sodium-potassium pump, and vesicle transport mechanisms like endocytosis and exocytosis.
Is it true if the process by which water moves across a selectively permeable membrane is called diffusion?
Diffusion is a physical process. When it is performed through a selectively permeable membrane, it is called osmosis. Thus osmosis is an appropriate word for movement of water molecules through a selectively permeable membrane and not diffusion.
What Word Goes in There As cell size goes effectiveness of diffusion and osmosis goes This drives the cells to stay small?
Surface area. As cell size increases, the surface area to volume ratio decreases. This decreased ratio makes it harder for nutrients and waste to diffuse in and out of the cell, driving cells to stay small for efficient diffusion and osmosis.
What is another term for the diffusion of water?
I think the word you're looking for is osmosis. Water with different ionic or molecular concentrations will move toward equilibrium.
What are metaphors for 'diffusion'?
Diffusion is the movement of a mineral or nutrient moving across the concentration gradient of a membrane. The closest word to diffusion would probobly be osmosis, which is the movement of water through a membrane.
What transport leave the cell without the use of energy?
Passive transport, such as simple diffusion or facilitated diffusion, allows certain substances (like gases, small molecules, and water) to move across the cell membrane without the input of energy. This movement occurs down the concentration gradient from an area of higher concentration to an area of lower concentration.
Is facilitated diffusion type of active transport?
No, facilitated diffusion is a type of passive transport in which molecules move across a cell membrane with the help of specific transport proteins. Active transport, on the other hand, requires energy to move molecules against their concentration gradient.
What stems are in the word osmosis?
The English word osmosis stems from the Greek word osmos,meaning "impulse".
Osmosis and raw egg and salt?
When a raw egg is placed in a saltwater solution, osmosis occurs. The salt concentration outside the egg is higher than inside the egg, so water moves out of the egg to try to balance the concentration. This causes the egg to shrink and become dehydrated.
How do you sue osmosis in a sentence?
the word osmosis is hard to say.
A sentence with the word osmosis?
Today we learned about osmosis in school
What is the movement of molecules from areas of higher concentration to lower concentration until equilibrium is met?
The movement of particles from an area of high concentration through a semi-permeable membrane to an area of low concentraton is the process of diffusion. I'm sorry but I do not think that answer is good enough. It is a form of diffusion, where only small particles, small enough to pass through the membrane can get through. When I was in school the statement above was the definition of osmosis, the whole point being it was diffusion through a semi-permeable membrane, selecting for only small enough particles. It seems some time between 1992 and 2003 the definition was changed to the movement of water, and not particles and now in 2010 the definition is the movement of solvents. I would like to know how and why the definition osmosis was changed, why and what is the justification? I would also like to know why the original meaning of osmosis, which made perfect sense, has been changed to "it's the definition of diffusion and not osmosis any more", when in fact it isn't a clear enough word to describe the process? Surely the new definition of osmosis is also diffusion?
