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What are ways to maximise the rate of diffusion of a substance across a membrane?
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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.
What is facilitated diffusion across the phospholipid membrane?
Facilitated diffusion is the movement a substance from high concentration to low concentration across a membrane through a transporter protein or channel
What is it called when a substance passes from the fluid in the tubular lumen through the apical membrane the across the cytosol into the interstitial fluid?
diffusion
How does active transport differ from the process of diffusion across a membrane?
Diffusion is the process in which a certain substance achieves equal concentrations in a specific area. Diffusion across a membrane means that the substance is equally distributed between both sides of the membrane, assuming the substance can pass through that membrane (the membrane is permeable to the substance).Active transport is just that, active. It requires energy because it is usually moving substances to a place where they would not naturally move or increases the rate of their disbursing. Active transport can move molecules against a concentration gradient, whereas diffusion cannot.Simply, active transport means that energy is needed to transport the object/molecule while diffusion is a naturally occurring process dependent on the concentration gradients between the membrane.
What motion of particles across a membrane requires energy?
Movement across a membrane that does require energy is called active transport.
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.
What is facilitated diffusion across the phospholipid membrane?
Facilitated diffusion is the movement a substance from high concentration to low concentration across a membrane through a transporter protein or channel
What is it called when a substance passes from the fluid in the tubular lumen through the apical membrane the across the cytosol into the interstitial fluid?
diffusion
How does active transport differ from the process of diffusion across a membrane?
Diffusion is the process in which a certain substance achieves equal concentrations in a specific area. Diffusion across a membrane means that the substance is equally distributed between both sides of the membrane, assuming the substance can pass through that membrane (the membrane is permeable to the substance).Active transport is just that, active. It requires energy because it is usually moving substances to a place where they would not naturally move or increases the rate of their disbursing. Active transport can move molecules against a concentration gradient, whereas diffusion cannot.Simply, active transport means that energy is needed to transport the object/molecule while diffusion is a naturally occurring process dependent on the concentration gradients between the membrane.
List one way osmosis is the same as diffusion?
A substance is passing through a membrane across a concentration gradient to the point of equilibrium.
What type of molecule movement consist on one way diffusion across a semi permeable membrane?
The movement of molecules across the semipermeable membrane follows the law of diffusion. Thus, the molecules of a substance move from their higher concentration towards their lower concentration by their own kinetic energy.
What motion of particles across a membrane requires energy?
Movement across a membrane that does require energy is called active transport.
What is the process that utilizes a carrier to move materials across the plasma membrane in the direction of the concentration gradient that does not use ATP?
Active Transport
Given that a nonpolar substance is more concentrated outside of a cell how does it get across a cell's plasma membrane without the expenditure of energy?
Osmosis and diffusion.
How does a polar substance get across a cells plasma membrane without the expendture of energy assuming it is more concentrated outside the cell?
Facilitated diffusion
How does a polar substance get across a cells plasma membrane without the expenditure of energy assuming it is more concentrated outside if the cell?
Facilitated diffusion
What is the process that utilizes a carrier to move marerials across the plasma membrane in the direction of the concentration?
Diffusion is what carries materials across the plasma membrane. The diffusion cannot be moved across water.
