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w hen solute concentrations differ on the two sides of a membrane
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When molecules move against their concentration gradient it is called?
This is known as active transport and requires energy usually in the form of ATP. It can also use the potential energy generated across a membrane by the transport of a different ion (either symport or antiport).
How does facilitated transport differ from active transport?
Simple diffusion = flow of small molecules ALONG the concentration gradient, does NOT require energy. facilitated diffusion = flow of molecules ALONG the concentration gradient with help of CARRIER PROTIENS or CHANNELS, does NOT require energy active transport= flow of larger or charged molecules AGAINST their concentration gradient, REQUIRES input of ENERGY in the form of ATP.)
Active transport always requires?
For active transport to occur, energy is needed in the form of ATP. During respiration energy is released in the form of ATPThe reason why energy (ATP) is needed with active transport is because active transport is movement of molecules from a low concentration to a high concentration so its going againstthe concentration gradient. As its going against the concentration, energy (in the form of ATP) is necessary or else this process will not occur.
What is active transport and passive transport?
active transport requires the use of energy aka ATP and is usually against the concentration gradient. passive transport does not require energy because it moves in response to the concentration gradient.
What movement of the substances through a cell membrane against a concentration gradient requires energy?
no because it is a form of passive transport. only active transport requires energy. facilitated diffusion just means that it cant be just absorbed through the membrane, it must go through specific chanels or be helped by transport proteins. but because facilitated diffusion moves from higher to lower concentrations, it requires no energy.
When molecules move against their concentration gradient it is called?
This is known as active transport and requires energy usually in the form of ATP. It can also use the potential energy generated across a membrane by the transport of a different ion (either symport or antiport).
How does facilitated transport differ from active transport?
Simple diffusion = flow of small molecules ALONG the concentration gradient, does NOT require energy. facilitated diffusion = flow of molecules ALONG the concentration gradient with help of CARRIER PROTIENS or CHANNELS, does NOT require energy active transport= flow of larger or charged molecules AGAINST their concentration gradient, REQUIRES input of ENERGY in the form of ATP.)
What part in a circuit that produces potential difference?
The potential difference is provided by the power source, which can be a battery or some form of electric generator. Inside the source, electric charges are raised up a potential gradient, and they then give up their energy as they travel down the potential gradient in the circuit that is being supplied with energy.
What can be considered as passive transport?
Any form of transport that does not require a form of energy, which means that it happens along a concentration gradient (from an area of high to low concentration) and across a selectively permeable membrane (Osmosis)
What is primary active transport?
Primary active transport is defined as utilizing energy in the form of ATP to transport molecules across a membrane against their concentration gradient. This means moving from a low concentration to a high concentration.
Active transport always requires?
For active transport to occur, energy is needed in the form of ATP. During respiration energy is released in the form of ATPThe reason why energy (ATP) is needed with active transport is because active transport is movement of molecules from a low concentration to a high concentration so its going againstthe concentration gradient. As its going against the concentration, energy (in the form of ATP) is necessary or else this process will not occur.
What is the electrochemical gradient of an ion?
spatial variation of both electrical potential and chemical concentration across a membrane. Both components are often due to ion gradients, particularly proton gradients, and the result can be a type of potential energy available for work in a cell
Is chemical energy kinetic energy or potential energy?
It is a form of potential energy.
What is active transport and passive transport?
active transport requires the use of energy aka ATP and is usually against the concentration gradient. passive transport does not require energy because it moves in response to the concentration gradient.
What movement of the substances through a cell membrane against a concentration gradient requires energy?
no because it is a form of passive transport. only active transport requires energy. facilitated diffusion just means that it cant be just absorbed through the membrane, it must go through specific chanels or be helped by transport proteins. but because facilitated diffusion moves from higher to lower concentrations, it requires no energy.
Is Active transport high to low or low to high concentration?
Active transport. To go "upstream" requires ATP, a form of energy, to pump against the ion gradient.
What requires no energy to move molecules across a membrane?
Any form of passive transport such as diffusion. This is because channels allow a high concentration gradient move to a lower one.
