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Answered 2011-01-22 15:02:57

yes, active transport does require energy.


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It is because active transport requires energy for it to work.

Passive transport requires no energy or work unlike active transport. It does not involve any chemical energy.

Facilitated diffusion and active transport differ because facilitated diffusion does not use energy. Active transport requires energy for it to work. So facilitated diffusion is more like passive transport.

The 2 methods of active transport are taking the energy and using the energy to where the cell is doing the work,the cell will transport what is needed and all us done.

the active transport work against conc gradient either in or out of the cell.

Active transport requires energy (ATP, GTP, etc) to work against the electrochemical gradient. Passive transport works with the electrochemical gradient and does not require energy. (Think diffusion)

Diffusion (passive transport) needs no energy to take place, and therefore no need for transport or carrier protiens. Active transport uses carrier protiens, as the cell needs to work against a concentration gradient. This requires energy. Diffusion can take place outside of cells Active transport can't take place outside of cells.

Active Trasport. The energy required to make active transport work is in the form of ATP(Adenosine Triphosphate), which is synthesized by the catabolic process of cellular respiration.

Movement of a substance that utilizes a carrier; energy comes directly from hydrolysis of ATP.

Movement of a substance that utilizes a carrier, and has a concentration gradient as the source of energy.

Diffusion, osmosis, facilitated transport and active transport- which requires energy to work.

Redox energy is the mitochondrial electron transport chain that uses the reduction energy of nadh to move protons across the inner mitochondrial membrane against the concentration difference

Primary active transport directly uses ATP by hydrolysisSecondary transport uses an electrochemical gradient across a membrane initiated by primary active transport.Primary active transport is the process in which ions are moved across cell membranes against the electrochemical gradient using energy supplied directly be ATP. The action of the sodium-potassium pump is an important example of primary active transport.Secondary active transport is indirectly driven by primary transport. In the sodium-potassium pump, by pumping against the gradient, energy is stored in the ion gradient. Then, just as water pumped uphill can do the work as it flows back down, (think water wheel or turbine), a substance pumped across the membrane can do work as it leaks back, propelled downhill along the concentration gradient.

Molecules are moved through the cell membrane by active transport.

Active transport requires the expenditure of energy by the cells. It is an uphill movement of a substance through a living cell membrane. Adenosine triphosphate or ATP is a chemical substance that gives the energy required for the active transport process. ATP is produced in the mitochondria using energy from nutrients and is capable of releasing that energy to do work in the cell. There is a breakdown of APT and a use of energy that makes this process possible. Cellular energy is required to move substances from a low concentration to a high concentration. Because the formation and breakdown of ATP requires complex cellular activity, active transport mechanisms can take place only through living membranes.

through active transport, as transport proteins are needed to fit them through the phospholipid bilayer. this requires energy, as the proteins are doing a lot of work to move the large molecules.

"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

Active transport is when a protein moves a certain material across the membrane from a region of lower concentration to a region of higher concentration. This means the substance is absorbed against the concentration gradient and energy is needed for this active transport to work. The energy is usually comes from adenosine triphosphate or ATP, every cell supplies its own ATP by cell respiration. Globular proteins or pump proteins or transporter proteins in membranes carry out the active transport, the membrane must contain a lot of these proteins so that the cell can control the contents of its cytoplasm precisely. An example of active transport is in human nerve cells where potassium ions are pumped in and sodium ions are constantly transported out of the cell by active transport into the external fluid bathing the cell to build up a store of potential energy or an electrical impulse that is used to transmit a nerve impulse.

It is an active transport,Transport mechanisms fall into two catagories passive and active. Passive transport mechanisms do not require the cell to do work for the substance to enter or leave the cell. Instead the energy involved comes from the kinetic energy of the molecules in solution. Active transport mechanisms involve the cell to use cellular energy usually in the form of ATP to power special protein pumps to bring material into the cell.Passive transport mechanisms Active Transport mechanismsSimple diffusionOsmosisFacilitated DiffusionSimple protein channelsGated channelsActive transport via protein pumpsBulk flow mechanismsendocytosisphagocytosispinocytosisexocytosisThe passive transport mechanisms and the protein pump mechanisms involve movement of substances as single molecules across the membrane. The "bulk" flow mechanisms endocytosis and exocytosis enable the cell to take in very large packages of molecules...say a food item from the environment. Many books treat these bulk flow mechanisms as separate from active transport for that reason.

the uses of energy is to do work or to work the transport such as:train,planes,cars,e.t.c.......

they work as a catalysator for the transportation. They lower the nessesary energy for a transport to start. This can in many cases only be achieved by highly specifically adapted carriers, which in cells is mostly proteins.

when molecule travels from a higher concentration to a lower concentration through a concentration gradient.It is known as passive transport. Active transport refers to when molecule travels from a region of lower concentration to a region of higher concentration against the concentration gradiet. Transport of protein is an active transport. Fit it in the sentence your way

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

Diffusion does not require APT or a carrier; atoms/molecules just flows with concentration gradient (equivalent to osmosis without the membrane barrier). Active Transport usually requires a protein carrier and ATP for the carrier to work. Active transport usually works against the concentration gradient in the human body. An example of active transport would be the Na/K pumps. hope that helps

Active transport requires energy, passive transport just happens. If there is more of a certain molecule on one side of a membrane than the other, molecules that CAN fit through the membrane will do, so the concentration will even itself out. No work has to be done to achieve this. SO when you breathe in, oxygen just diffuses across from the air into your blood, because there's plenty of it in the air. But if a plant needs to get say magnesium from the soil (which it needs to make chlorophyll) then it is not going to get much by diffusion, because there's not much in the soil and probably more in the plant. It will need to use active transport ie a protein in the cell wall will pick up the substance wanted and flip it into the cell, and this costs the cell some energy.

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