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Does a cell use energy when molecules diffuse in or out of the cell down the concentration gradient?
Wiki User
∙ 11y ago
Diffusion is passive transport - it means that the cell doesn't use any energy transporting the materials. However, if there is more of a substance inside a cell than outside a cell (like nutrients), and the cell needs to get the nutrients in, diffusion will not owrk. The cell uses energy to do active transport and get the particles in.
Wiki User
∙ 15y ago
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Why does active transport require more energy than osmosis or faciliated diffusion?
It is because during active transport, the molecules are being transported against and toward the concentration gradient whereas in diffusion, the molecules go from the concentration gradient.
What is the type of transport in which a cell goes against the concentration gradient in order to diffuse substances within?
Active transport is used to move molecules and ions across a membrane against their concentration gradient. "Active" means that the transporter requires energy to do its job (eg. glucose).
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 proceeds against a concentration gradient?
Molecules can move against concentration gradient by a movement called active transport. Molecules move from an area of low concentration to an area of high concentration by using chemical energy called ATP or an electrochemical gradient--either way, it uses cellular 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.
Do Substances naturally diffuse up a concentration?
no down a concentration gradient high to low if its low to high it requires energy
Why does active transport require more energy than osmosis or faciliated diffusion?
It is because during active transport, the molecules are being transported against and toward the concentration gradient whereas in diffusion, the molecules go from the concentration gradient.
Rate of diffusion is dependent upon molecular?
size, temperature, and concentration gradient. Smaller molecules diffuse faster than larger molecules, as they can more easily navigate through the spaces between other molecules. Higher temperatures increase the kinetic energy of the molecules, leading to faster diffusion. A steeper concentration gradient, where there is a large difference in concentration between two areas, also promotes faster diffusion.
What is the type of transport in which a cell goes against the concentration gradient in order to diffuse substances within?
Active transport is used to move molecules and ions across a membrane against their concentration gradient. "Active" means that the transporter requires energy to do its job (eg. glucose).
Does active transport result in an even distribution of molecules?
No. Active transport uses energy to transport specific molecules against a concentration gradient. Passive transport will result in an even distribution of molecules because they allow molecules to move down a concentration gradient.
What is the Common forms of transport?
Simple Diffusion - Lipid soluble molecules diffuse across the plasma membrane of a cell, uses no ATP energy and only occurs down a concentration gradient.Facilitated Diffusion - Molecules use the aid of proteins scattered throughout the plasma membrane to help them diffuse into or out of a cell, uses no ATP energy and only occurs down a concentration gradient.Co-transport - A molecule such as glucose may have a lower concentration inside a cell than outside so it attaches to a carrier protein, as does a molecule that is higher in concentration inside than outside, a sodium ion for example. The glucose is pulled through the membrane because of its concentration gradient, as this happens the sodium ion is also pulled through. This uses no ATP energy but only occurs if a molecule can move down a concentration gradient (on an exam paper you would have to explain that the sodium moves against a concentration gradient to get full marks).Active transport - A molecule uses the aid of carrier proteins to diffuse against a concentration gradient, this does use ATP energy. The ATP is needed to make the carrier protein change shape. This only occurs against a concentration gradient.
In facilitated diffusion do molecules move down concentration gradient?
Without using the cell's energy
What are Conditions needed to cause water to diffuse in cell?
The primary drivinf force for diffusion is a concentration gradient. There has to be an abundance of molecules at one region and a scarcity of molecules at another. This differential distribution of molecules where one region has more than the other is called a concentration gradient. In the presence of this gradient, diffusion occurs without the expenditure of energy. In cells, diffusion can occur through the cell membrane. Water molecules move into or out of the cell depending on where there are more water molecules. If there is more water outside the cell, water molecules move in and vice versa.
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.)
Why does active transport require more energy than osmosis or facilitated diffusion?
Active transport requires more energy than diffusion this is because during active transport, the molecules are being transported against and toward the concentration gradient whereas in diffusion, the molecules go from the concentration gradient.
What is the relationship between a concentration gradient and the rate of diffusion?
the concentration gradient is about both active and passive transport equilibrium is when the is no concentration gradient but equilibrium is a transient condition this is because molecules are in constant random motion the electrons spinning around the molecule's nucleus keep them in random motion since they're in random motion they constantly bump into each other since the constantly bump into each other they try to spread out this describes the force of diffusion so, when the molecules are bunched together they have high concentration they'll try to spread out, which moves them to lower concentration this means they have moved down the concentration gradient it is passive transport because these was no energy used to make it happen as long as the molecules are small enough in other words as long as there's no large molecules dissolved in the solution then the solution and its solutes are free to diffuse but any large molecules dissolved in the solution will not pass through a semipermeable membrane
What proceeds against a concentration gradient?
Molecules can move against concentration gradient by a movement called active transport. Molecules move from an area of low concentration to an area of high concentration by using chemical energy called ATP or an electrochemical gradient--either way, it uses cellular energy.
