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What energy from the hydrolysis of ATP is used to drive substances across the membrane against their own concentration gradients?
Wiki User
∙ 11y ago
primary active transport
Wiki User
∙ 11y ago
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What functions do carrier proteins perform in active transport?
Carrier proteins of the cell membrane transport substances down their concentration gradient out of or into the cell by facilitated diffusion and active transport.
How does active transport differ from diffusion?
Active transport expends energy, unlike osmosis and diffusion. Active transport is a way to move substances against concentration gradients in the cell membrane, so they need more energy to do so.
Which affects the rate of diffusion through a semipermeable membrane steeper concentration of gradients higher temperatures or the size of the molecule diffusing?
all of thouse factors
What regulates which substances enter and leave a cell?
The plasma membrane. Carrier proteins and ion channels are parts of the plasma membrane, and aid in diffusion across concentration gradients, as most things don't freely move from one end of the cell membrane to the other. The Sodium-Potassium pump is a major ion channel in the plasma membrane, and regulates the intake of potassium and export of sodium (3 molecules sodium out, 2 molecules potassium in.)
What does concentration gradient have to do with diffusion of substances across the cell membrane?
concentration gradient moves from high to low until equilibrium is reached.
Facilitated diffusion carrier proteins and cell membrane pumps both?
They both transport substances up their concentration gradients.
What is the pumping of materials across a membrane against their concentration gradients?
Active Transport
What functions do carrier proteins perform in active transport?
Carrier proteins of the cell membrane transport substances down their concentration gradient out of or into the cell by facilitated diffusion and active transport.
What are the functions of the cell membrane of a cell?
The cell membrane controls what substances enter and leave the cell and at what rate it also separates the inside of the cell from its surroundings keeping the contense of the cell together and concentration gradients in place and don't forget it also contains receptors which allow messages to be convayed to cells.
How does diffusion from active transport?
Active transport expends energy, unlike osmosis and diffusion. Active transport is a way to move substances against concentration gradients in the cell membrane, so they need more energy to do so.
What are the types of membrane protein?
ATP-powered pumps are ATPase's that use the energy of ATP hydrolysis to move ions or small molecules across a membrane against a chemical concentration gradient or electric potential. Channel proteins transports water or specific types of ions down their concentration or electric potential gradients. Transporters move a wide variety of ions and molecules across cell membranes.
How does active transport differ from diffusion?
Active transport expends energy, unlike osmosis and diffusion. Active transport is a way to move substances against concentration gradients in the cell membrane, so they need more energy to do so.
Which affects the rate of diffusion through a semipermeable membrane?
steeper concentration gradients, higher temperatures and size of the molecule diffusing
What is a sentence with the words diffusion and osmosis?
Osmosis is the mechanism by which diffusionacross a cell membrane occurs when there is a concentration gradient from one side of the membrane to the other.Osmosis and Diffusion are extremely similar because they both involve molecules moving from a high to low concentration to reach equilibrium.Diffusion and osmosis are the same in that they both move down their gradients to cause substances to be evenly distributed.
What determines whether carbon dioxide is absorbed or released by blood?
The rate at which carbon dioxide enters the cell is determined by the concentration of carbon dioxide on each side of the membrane. Carbon dioxide crosses the plasma membrane by simple diffusion.
Which affects the rate of diffusion through a semipermeable membrane steeper concentration of gradients higher temperatures or the size of the molecule diffusing?
all of thouse factors
Which channel maintains the concentration gradients of ions across a neuronal membrane?
The sodium- potassium pump pump moving Na+ ions out and K+ ions in
