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Substances that move across a cell membrane without using energy?
Passive transport is the movement of substances across a cell membrane without the use of energy. This process includes simple diffusion, facilitated diffusion, and osmosis. These mechanisms rely on the concentration gradient to drive the movement of molecules.
Movement of a substance across a cell membrane using chemical energy occurs during?
Active transport is the movement of a substance across a cell membrane using chemical energy. This process requires the use of a carrier protein and ATP to transport molecules against their concentration gradient.
Which activity can occur without the use of energy?
Movement of water across the cell membrane
When a substance moves across the plasma membrane along a concentration gradient at a rate faster than would be expected by simple diffusion alone but without the expenditure of metabolic energy?
The process is called facilitated diffusion, as it relies on carrier proteins or channel proteins to aid in the movement of the substance across the membrane. It does not require the cell to use energy because the movement is still following the direction of the concentration gradient.
What is meant by passive transport of material across a membrane?
"Passive" mean that it does not require energy, therefore the passive transport of material across the membrane means that it can transport the material (cells or whatever) without the function of energy across the membrane.
What is a substance that moves across a cell membrane without using the cells energy tends to move?
away from the area where it is more concentrated
Given that a nonpolar substance is more concentrated outside of a cell how does it get across a cell's plasma membrane without the expenditure of energy?
Osmosis and diffusion.
How does a polar substance get across a cells plasma membrane without the expendture of energy assuming it is more concentrated outside the cell?
Facilitated diffusion
What uses a protein to move a molecule across a membrane without energy?
Facilitated diffusion uses proteins to move a molecule across the cell membrane without energy.
How does a polar substance get across a cells plasma membrane without the expenditure of energy assuming it is more concentrated outside of the cell?
it goes in straight lines
What process does not require energy to move a substance across a membrane?
Osmosis because it is the equalization of pressure.
What used a protein to move a molecule across a cell membrane without energy?
Facilitated diffusion uses proteins to move a molecule across the cell membrane without energy.
When sugars pass across a membrane without the use of energy?
Passive transport.
Substances that move across a cell membrane without using energy?
Passive transport is the movement of substances across a cell membrane without the use of energy. This process includes simple diffusion, facilitated diffusion, and osmosis. These mechanisms rely on the concentration gradient to drive the movement of molecules.
What is the difference between facilitated diffusion with the help of a carrier protein and active transport with the help of a transport protein?
Facilitated diffusion is a type of passive transport in which a substance moves across the cell membrane from high to low concentration. In this situation, the substance moves with the concentration gradient, and with the help of carrier molecules, it is able to make it's way across the membrane smoothly and without the expense of energy. Active transport, on the other hand, is the movement of a substance across the cell membrane from low to high concentration, making the transport a bit more difficult and calling for the use of energy. Transport proteins recognize the substance and allow it to cross through the membrane.
What is the difference between facilitated diffusion with the help of a carrier protein and active transport with the help of the transport protein?
Facilitated diffusion is a type of passive transport in which a substance moves across the cell membrane from high to low concentration. In this situation, the substance moves with the concentration gradient, and with the help of carrier molecules, it is able to make it's way across the membrane smoothly and without the expense of energy. Active transport, on the other hand, is the movement of a substance across the cell membrane from low to high concentration, making the transport a bit more difficult and calling for the use of energy. Transport proteins recognize the substance and allow it to cross through the membrane.
What is the difference between facilitated diffusion with the help of a carrier protein and active transport with the help of a transport transport?
Facilitated diffusion is a type of passive transport in which a substance moves across the cell membrane from high to low concentration. In this situation, the substance moves with the concentration gradient, and with the help of carrier molecules, it is able to make it's way across the membrane smoothly and without the expense of energy. Active transport, on the other hand, is the movement of a substance across the cell membrane from low to high concentration, making the transport a bit more difficult and calling for the use of energy. Transport proteins recognize the substance and allow it to cross through the membrane.
