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How is diffusion different from active transport?
active transport is different from diffusion. active transport has to do with the movement of chemical substance through a gradient of concentration. diffusion has to do with requiring the expenditure of energy
How does active transport work against the concentration gradient to move substances across a cell membrane?
Active transport is a process in which cells use energy to move substances against their concentration gradient, from an area of low concentration to an area of high concentration, across the cell membrane. This is achieved by using specialized proteins called pumps that actively transport the substances across the membrane, requiring energy in the form of ATP.
How can molecules move without diffusion or osmosis?
Apart from osmosis and diffusion the major mechanism for individual molecules to move is by active transport. Active transport is the movement of molecules against their concentration gradient (from a low to a high concentration) using energy supplied by the cell. It differs from diffusion which can only work down a concentration gradient ie from a high concentration to a low concentration. It also needs a source of energy supplied by a living cell, which is not needed for difusion. In cells, energy for active transport is supplied by respiration. See http://www.bbc.co.uk/schools/gcsebitesize/biology/cellprocesses/2diffusionandosmosisrev1.shtml
What types of transport moves molecules along a concentration gradient?
I'm not sure you're understanding the question you are asking. Molecules are the tiny building blocks, made up of atoms, that are used to create everything in our galaxy. Cells are a single living unit that work together to be a living thing. If you are interested in how parts of a cell move around or pass along material, you should look up how cells work or ask a more specific question.
How does osmosis work to move material in and out of the cell?
Osmosis is the movement of water molecules across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration. This process helps to balance the concentration of solutes inside and outside the cell, regulating the flow of water in and out to maintain cell function.
Does simple diffusion work with or against the concentration gradient?
I think that it is something
What is the control in an experiment to demonstrate osmosis?
If you are doing the experiment with potato or similar (other plant tissue) then you boil the potato you are taking the sample from before you use it, to shoe that the plant tissue needs to be alive for the experiment to work.
How is diffusion different from active transport?
active transport is different from diffusion. active transport has to do with the movement of chemical substance through a gradient of concentration. diffusion has to do with requiring the expenditure of energy
Which way do molecules move during active transport?
Molecules move against their concentration gradient, from an area of low concentration to high concentration, in active transport. This process requires energy input to pump the molecules across a membrane using specific proteins like pumps or carriers.
How does active transport work against the concentration gradient to move substances across a cell membrane?
Active transport is a process in which cells use energy to move substances against their concentration gradient, from an area of low concentration to an area of high concentration, across the cell membrane. This is achieved by using specialized proteins called pumps that actively transport the substances across the membrane, requiring energy in the form of ATP.
How can molecules move without diffusion or osmosis?
Apart from osmosis and diffusion the major mechanism for individual molecules to move is by active transport. Active transport is the movement of molecules against their concentration gradient (from a low to a high concentration) using energy supplied by the cell. It differs from diffusion which can only work down a concentration gradient ie from a high concentration to a low concentration. It also needs a source of energy supplied by a living cell, which is not needed for difusion. In cells, energy for active transport is supplied by respiration. See http://www.bbc.co.uk/schools/gcsebitesize/biology/cellprocesses/2diffusionandosmosisrev1.shtml
Why is concentration gradient needed for diffusion to work?
They want to be a equilibrium (have the same concentration both inside and outside the semi-permeable membrane). Therefore they will move from a higher concentration to a lower in an effort to gain equilibrium. This does not require energy, unlike active transport.
What is transportation work?
"In transport work, ATP drives the active transport of solutes across a membrane against their concentration gradient by phosphorylating transport proteins". (Solutes are transported.) Save the animals!! :D
How does osmosis work in biological systems?
Osmosis is the movement of water molecules across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration. In biological systems, osmosis helps maintain the balance of water and nutrients within cells and tissues.
Which arrangement of hydrogen ions allows work to be done?
In order for hydrogen ions to do work , their concentration on each side of the membrane must be different. When the concentrations are the same the system is at equilibrium and can not do work.
Is pumping air into a tire diffusion osmosis or active transport?
Well, isn't that a happy little question! Pumping air into a tire is actually neither diffusion osmosis nor active transport. It's more like good old-fashioned physical work - you're simply using a pump to increase the pressure inside the tire. Just remember, there are no mistakes, only happy accidents!
How does osmosis work?
Osmosis is the diffusion across a semi-permeable membrane. It works by moving the water molecules to the place of low concentration until it reaches equilibrium. Osmosis is the movement of water molecules from a high concentrated area to a low concentrated area through a partially permeable membrane
