Which of the following is not a factor that influences the rate of diffusion?
31 people found this useful
Factors Affecting the Rate of Diffusion . Size . Small molecules can slip by the polar heads of the phospholipidsand through the membrane to the other side. Oxygen gas, …carbondioxide and water can move in this manner. Very large moleculeslike proteins cannot diffuse across the membrane at all.. Shape . Glucose is able to get into cells much faster than other sugars.This is accomplished by facilitated diffusion. A carrier proteinspecific for glucose (not other sugars) combines with it on theouter surface, closes around it, and then opens to the inside ofthe cell where the glucose is released. The carrier then returns toits original shape and is ready to transport another glucosemolecule. These carriers can move up to 100 glucose molecules persecond across the cell membrane.. Concentration . The greater the concentration gradient between the outside andinside of the membrane the greater the rate of diffusion. If theconcentration of oxygen outside the cell increases then it willdiffuse more quickly into the cell. The opposite is also true. If amuscle cell for example is working hard and using up largequantities of oxygen in cellular respiration producing ATP, thenthe low levels inside the cell will increase the concentrationgradient compared to outside and the rate of diffusion of oxygeninto the cell will increase. The same conditions in a muscle cellwould create high concentrations of carbon dioxide inside the celland increase the rate of diffusion from inside to outside.. Charge (+/-) . Ions or molecules with a charge cannot pass through the lipidbilayer by diffusion. Other mechanisms involving protein carriersand ATP energy are required. The sodium/potassium ion pump is anexample of this type of transport.. Lipid Solubility . Lipid soluble molecules can move through the lipid bilayer.Generally these molecules are other lipids. Steroid hormones liketestosterone and estrogen are examples of such molecules. This easyaccess to cells explains the powerful and wide ranging effects ofsuch hormones.. Temperature . In general, increases in temperature cause all molecules to movefaster. Diffusion is a passive movement of molecules so quickermolecule movement translates into quicker diffusion. Rate of diffusion increases as: * Diffusion distance decreases *Concentration gradient increases * Surface area increases.
distance and the material through which diffusion is occurring (each material has a diffusion coefficient).
When a temperature increases, diffusion rates will increase. Thisis because higher temperatures cause more energy, and a particlewill move faster.
Factors that influence rate of diffusion . The rate of diffusion depends on the concentration difference across the two sides of the membrane. . The rate depends on the perm…eability of the plasma membrane to the diffusing substance. . The rate of diffusion depends on the temperature of the solution. . The rate of diffusion through a membrane is also directly proportional to the surface area of the membrane, which can be increased by such adaptations as microvilli. the thickness of the cell membrane the mass of the solute particles the difference in the initial concentration gradient *these are also factors that influence the rate of diffusion between extracellular and intracellular environments
The rate of diffusion increases with temperature. The rate ofdiffusion also increases with the concentration gradient and thesurface area.
Relative molar mass, temperature, and concentration difference/gradient.
Temperature because it makes the atoms in the molecule move faster.
most likely a colder temperature. or the wrong pH.
Consintration temperature and pressure
Polarity, Density, Temperature,... - you need to be a bit more specific with your question what's diffusing into what?
the factors which affect the rate of diffusion are: temperature, surface area, diffusion distance, size of particles,permeability,and concentration difference. .
Temperature is one of them. Cold slows it.
Which of the following abiotic factors has the greatest influences on the metabolic rates of plants and animals?
Temperature . Pressure . Molecular mass of the diffusing gas
the factors which affect rate of diffusion is the factors that mixing one substance to another.