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When substances move through a cell membrane by diffusion the cell uses a lot of energy to move those substances. Is this true or false?
Wiki User
∙ 16y ago
a cell can only diffuse water, right? so it must be false cause that requires no energy
Wiki User
∙ 16y ago
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Substances that move across a cell membrane without using energy?
by simple diffusion, facilitated diffusion, and osmosis.
What role does a cellular membrane play in passive transport?
hahahah That's not even an answer. They act as barriers to the diffusion of certain substances. ---------------------------------------------------------------------------------- Better Answer: Well actually the membrane can facilitate diffusion (such as that of larger macromolecules) through channel proteins.
The rate of diffusion through a semipermeable membrane will be lowest when?
The rate of diffusion through a semipermeable membrane will be lowest when temperatures are low. Lower temperatures decrease the energy of the molecules, which in turn decreases the rate of diffusion.
The movement of substances across the cell membrane that requires the cell to use energy?
It's called active transport. When talking about the cell, it is usually bigger substances that use passages in the cell membrane to access the inner part of the cell, and they need energy to get there. The opposite; passive transport or diffusion, is the movement of dissolved materials through a cell membrane without the use of cellular energy. THis happens with smaller substances.
What is it called when the movement of materials through a cell membrane without using the cells energy?
Passive transport does not use energy to pass through a cell membrane. active transport uses energy to pass through a cell membrane.
In order for substances to move through the cell membrane what must there be?
For passive diffusion, a concentration gradient which uses pore proteins. For active diffusion, carrier proteins and energy are required.
Substances that move across a cell membrane without using energy?
by simple diffusion, facilitated diffusion, and osmosis.
What are 2 ways that substances across the cell membrane without using energy?
simple diffusion, facilitated diffusion, and osmosis (water)
What role does a cellular membrane play in passive transport?
hahahah That's not even an answer. They act as barriers to the diffusion of certain substances. ---------------------------------------------------------------------------------- Better Answer: Well actually the membrane can facilitate diffusion (such as that of larger macromolecules) through channel proteins.
What is diffusion in a cell?
Diffusion is an impromptu process in which cells allow certain substances to pass the plasma membrane, and not use any energy to do so.
What is net movement of substances across plasma membrane without additional energy?
Diffusion. With the need of energy, it would be called active transport.
The rate of diffusion through a semipermeable membrane will be lowest when?
The rate of diffusion through a semipermeable membrane will be lowest when temperatures are low. Lower temperatures decrease the energy of the molecules, which in turn decreases the rate of diffusion.
What is the movement of materials through a cell membrane?
Movement of substances into and out of cells include passive mechanisms that do not require cellular energy (diffusion, facilitated diffusion, osmosis, and filtration) and active mechanisms that use cellular energy (active transport, endocytosis,and exocytosis).
How are the 3 passive transports different?
Simple diffusion - High concentration to low concentration, no energy required osmosis - Movement of water across a membrane, no energy required facilitated diffusion - Movement of substances, protein's are used to help move the substances across the membrane. There are very basic summaries of each.
The movement of substances across the cell membrane that requires the cell to use energy?
It's called active transport. When talking about the cell, it is usually bigger substances that use passages in the cell membrane to access the inner part of the cell, and they need energy to get there. The opposite; passive transport or diffusion, is the movement of dissolved materials through a cell membrane without the use of cellular energy. THis happens with smaller substances.
What is it called when the movement of materials through a cell membrane without using the cells energy?
Passive transport does not use energy to pass through a cell membrane. active transport uses energy to pass through a cell membrane.
Is facilitated diffusion?
Facilitated Diffusion is the movement of molecules across cell membranes through protein channels and carrier proteins.Facilitated diffusion is a passive transport process, aka no energy required, where substances move down their concentration gradient (high concentration to low concentration) across a protein through a membrane protein because it is unable to diffuse directly through the phospholipid portion of the membrane itself.Diffusion of molecules assisted by protein channels that pierce a cell membrane
