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What else can I help you with?
What is the membrane said to be if a substance is able to diffuse across a membrane?
selectively permeable
If a substance is able to diffuse across a membrane then the membrane is said to be what?
selectively permeable
If a substance is unable to diffuse across a membrane we say the membrane is?
osmotically active
What are ways to maximise the rate of diffusion of a substance across a membrane?
To maximize the rate of diffusion of a substance across a membrane, you can increase the concentration gradient by maintaining high concentration levels on one side. You can also increase the surface area of the membrane for more contact between the substance and the membrane. Additionally, ensuring the membrane is thin and permeable will aid in faster diffusion.
The difference in the concentrations of a substance across a cells membrane?
action potential
When does diffusion occur across a cell membrane?
Diffusion across a cell membrane occurs when concentrations of a substance are higher either inside or outside the cell.
If substance A could defuse across the membrane what would happen to the concentration of A inside the cell and outside the cell?
If substance A can diffuse across the membrane, it will move from an area of higher concentration to an area of lower concentration until equilibrium is reached. This means that the concentration of A inside the cell will increase while the concentration outside the cell will decrease, assuming that the initial concentration outside the cell is higher than inside. Eventually, the concentrations inside and outside the cell will become equal if no other factors interfere.
Which term describes the difference in the substance across a cells membrane?
Concentration Gradient.. :)
Describes the difference in the concentrations of a substance across a cell membrane?
action potential
What describes the difference in the concentrations of a substance across a cells membrane?
action potential
How do carrier proteins transport substance across the membrane?
The carrier protein changes shape , shielding the molecule from the interior of the membrane.
Why can oxygen defuse across a cell membrane but protein cannot?
Because an oxygen atom is very small and a protein is made up of lots of atoms and is therefore very large by comparison.
