how does surface area to volume ratio affect diffusion?
483267
The surface area--to-volume ratio makes the small cells more efficient, not the rate of diffusion. Smaller cells, with a larger surface area--to--volume ratio, are more efficient for diffusing materials in and out because, as a cell grows, the volume grows faster than the surface area.
436870
Because surface area is the means by which a solid interacts with its surroundings, be it gas, liquid or other solids. As particle size decreases, the surface area per unit volume (or mass) increases.
1410236
How are gradients important in diffusion and osmosis? It is what makes diffusion and osmosis happen. Without gradient, there would be no need for movement from high to low concentrations. If all cell were isotonic, there would be no flow of nutrients.
629726
The reason we use the rms velocity instead of the average is that for a typical gas sample the net velocity is zero since the particles are moving in all directions. This is a key formula as the velocity of the particles is what determines both the diffusion and effusion rates.
764802
The particle size affects the rate of diffusion by only allowing molecules that can fit through the barrier of the cell membrane. The molecular weight of the molecule can affect passage through the membrane because of the size they carry. Larger molecule are not able to pass through.
694118
Surface area is how much area of the object is exposed to the outside. The volume is how much space is inside the shape. The surface-area-to-volume ratio tells you how much surface area there is per unit of volume. ... If you are given the numbers, then you simply divide the surface area number by the volume number.
769948
Nanoparticles have very large surface area to volume ratios compared to the same material in bulk, as powders, lumps or sheets. For a solid, the smaller its particles, the greater the surface area to volume ratio.
1474830
In the context of smells and the human length scale, diffusion has almost squat to do with how 'smell' moves. The dominant effect in the spreading and movement of a molecular suspension in gas is convection.
823738
During diffusion the molecules move from the region of high concentration to that lower. ... [Should be noted, permeability is a kind of diffusion from polymer film or layer which is porous.
191075
In simple diffusion, the molecules can pass only in the direction of concentration gradient. In facilitated diffusion, the molecules can pass both in direction and opposite of the concentration gradient. Simple diffusion permits the passage of only small and nonpolar molecules across the plasma membrane.
838709
It could be the movement of water (osmosis), or other "stuff" (diffusion). If a cell is placed in an isotonic solution, that means the amount of stuff inside the cell and outside the cell is equal. ... No diffusion or osmosis will occur.
713747
How are gradients important in diffusion and osmosis? Gradients allow materials to move across membranes, from an area of high concentration to an area of low concentration. ... Water will move out of a plant cell if it has a higher water potential (concentration) than the surrounding environment.
843396
As the size of an organism increases, its surface area to volume ratio decreases. This means it has relatively less surface area available for substances to diffuse through, so the rate of diffusion may not be fast enough to meet its cells requirements. ... Its surface area to volume ratio is 24:8 which equals 3:1.
13076
It could be the movement of water (osmosis), or other "stuff" (diffusion). If a cell is placed in an isotonic solution, that means the amount of stuff inside the cell and outside the cell is equal. ... No diffusion or osmosis will occur. That's because passive transport mechanisms seek to reach equilibrium.
702309
To calculate the surface area, we start with a sphere, remove the area of the spherical caps, then add back in the area of the new (inverted) spherical caps. The differences are very small. The volume reduction from a smooth sphere is approximately 1.48%. The increase in surface area from the dimples is 0.324%.
968781
When the cell increases in size, the volume increases faster than the surface area, because volume is cubed where surface area is squared. When there is more volume and less surface area, diffusion takes longer and is less effective. ... this is actually why cells divide.
68037
The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume.