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Assisted transport of a molecule across the cell membrane without an expenditure of energy is known as?
Wiki User
∙ 14y ago
Any movement of molecules into or out of a cell without the expenditure of energy is called diffusion. If the molecule uses special channels to diffuse through the membrane (again, not expending energy), it is called facilitated diffusion.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agofacilitated diffusion
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What is it called when a molecule uses energy to move across a semiseprable membrane?
active transport
How do carrier protiens transport substances across cell membrane?
1-A carrier prrotein binds to a molecule on one side of the cell membrane. 2-The carrier protein changes shape,shielding the molecule from the interior membrane. 3-The molecule is released on the other side of the membrane.
The diagram represents movement of a large molecule across a membrane?
It depends on what is moving across the membrane. Some molecules use transport proteins and the cell would need those embedded in the membrane. Water doesn't need them and it freely moves in and out.
Which type of transport occurs when a membrane protein binds to a molecule on one side of the cell membrane and then releases it on the other side?
well daa its facilitated diffusion :] -Aime-
What change takes place in the cell membrane if a signal molecule causes a transport protein to open?
A permeability change takes place.
How does a cell move a molecule that is too large transport proteins?
The cell membrane folds around the molecule.
What happens if a molecule is too large to go through a membrane?
The molecule will be transported across the membrane by way of a transport protein or protein channel.
What kind of molecule is used to transport molecules across the membrane?
hydropolactive.
How does cell move molecule that is too large for transport proteins?
The cell membrane folds around the molecule.
What is it when a molecule uses energy to move across a semipermeable membrane?
active transport
What requires the use of the energy and the help of transport proteins to move a molecule across a cell membrane?
Active transport
How do carrier proteins transport substance across the membrane?
The carrier protein changes shape , shielding the molecule from the interior of the membrane.
What type of molecule embedded in the cell membrance allows larger molecule to pass through the membrance by active transport?
Transport proteins allow the active transport of large molecules through the cellular membrane.
What molecule uses energy to push molecules through the membrane of a cell?
Transport Protein
What is it called when a molecule uses energy to move across a semiseprable membrane?
active transport
What required the use of energy to move a molecule across a cell membrane?
Active transport
What require the use of energy to move a molecule across a cell membrane?
Active transport
