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What does the controlled substance act state concerning vehicle transport of substances?
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How do carrier proteins recognize substances to transport in active transport?
substance to pass
How do carrier protein recognize substances to transport in active transport?
substance to pass
What is used to move a substance through a membrane in active transport?
Electrochemical gradient is used to move substances through a membrane in active transport.
What is passive membran transport?
The diffusion of substances across a membrane is called passive transport. Molecules move from where the substance is more concentrated to where it is less concentrated.
What is the movement of a substance against the substances concentration gradient?
Active transport, or reverse osmosis; depending upon conditions.
What substances are used as pumps and channels in the cell membrane?
There is one substance that is used to pump and channel a cell membrane. The substance is known as energy.
What 3 ways can substances enter and leave a cell?
Substances can move in and out of a cell in several ways. Diffusion is when a substance will distribute itself in or out of a cell until the distribution on both sides of the cell is balanced. Active transport is when a cell transports a substance across the cell membrane that would not normally be able to pass through. Osmosis is the movement of water from areas with few dissolved dissolved substances to areas with high dissolved substances.
What property of the cell membrane enables it to perform active transport?
Embedded in the semi-permeable cell membrane are many different types of carrier proteins or channel proteins. These globular proteins allow the transport of specific substances from the outside of the cell into the cell or vice versa.Specific means each protein can only transport one type of substance across. For example, Protein A can transport Substance X but not Substance Y. Substance Y has to be transported by Protein B which cannot transport Substance X. The specific nature of these globular proteins mean it is easier for these molecules to be transported.
Why do cells have a variety of different transport mechanisms across the cell membrane?
Cells need to regulate each substance so its import and export is controlled. If there would be one mechanism to import every substance, the concentration of any individual molecule couldn't be controlled.
What is a transport protien?
YO ITS JOJO HERE myspace.com/ILOVEHALO3GUY A transmembrane protein that helps a certain substance or class of closely related substances to cross the membrane
What is the process that requires cellular energy to move a substance against its concentration gradient?
Active transport uses energy to move substances against the concentration gradient.
Why aren't osmosis and simple diffusion sufficient for the transport of all substances?
Osmosis and simple diffusion are not sufficient for the transport of all substances due to their nature. They only have the ability to transport substances which can pass through the cell membrane.
